My NUMBER OPERATIONS Book 4 Name: ___________________________________ Section: ________________ Roll No.: _________ School: __________________________________
Contents 1 Fact Family: 9–19....................................................... 1 2 Breaking Down Numbers.......................................... 19 3 Skip Counting.............................................................27 4 Repeated Addition................................................... 31 5 Repeated Subtraction.............................................. 37 6 Multiplication Tables................................................. 41 Grade 4_Maths.indb 2 07-11-2018 17:08:14
Fact family: 9–19 Let us revise Complete the fact family for each set of numbers given below. Fact families of 9, 10 9 Fact family: 9, 8, 1 9 Fact family: 9, 9, 0 1 1+ = 8 1 0=9– 2 =1+ 9 2 0+9= 3 +8= 3 0= – 4 1+8= 4 9=9+ Fact family: 9, 7, 2 7 Fact family: 9, 6, 3 6 1 2= – 1 3= – 3 2 9–2= 9 2 9= + 3 3 +7= 9 3 –6= 9 4 +2= 4 6+ = Fact family: 9, 5, 4 Fact family: 10, 10, 0 1 5=9– 2 9=4+ 1 10 = +0 3 9=5+ 4 =4+ 2 – 0 = 10 3 10 + 0 = 5 4 0 = – 10 1 Grade 4_Maths.indb 1 07-11-2018 17:08:16
Fact families of 10, 11 Fact family: 10, 9, 1 Fact family: 10, 8, 2 1 9 + = 10 1 8= – 2 8 2 10 = 1 + 2 = 10 – 2 3 10 = +1 3 10 = + 4 =1+9 4 10 = 2 + 5 1 + = 10 5 10 – 8 = 6 1+9= 6 8 = 10 – Fact family: 10, 7, 3 Fact family: 10, 6, 4 1 + 4 = 10 1 10 – =3 2 6+4= 3 4 = 10 – 2 –3=7 4 10 – 6 = 5 –4=6 3 10 = 3 + 6 –6=4 4 10 – 3 = 5 7 + = 10 6 =3+7 Fact family: 10, 5, 5 Fact family: 11, 11, 0 1 5+5= 1 11 = +0 2 –5=5 2 11 = 11 + 3 5= –5 3 – 0 = 11 4 + 5 = 10 4 11 = + 11 5 10 – 5 = 5 11 – 0 = 6 5 + = 10 6 + 0 = 11 2 Grade 4_Maths.indb 2 07-11-2018 17:08:18
Fact families of 11, 12 Fact family: 11, 10, 1 Fact family: 11, 9, 2 1 – 10 = 1 1 2= –9 2 1= – 10 2 9 + = 11 3 11 – 10 = 3 11 = +2 4 10 = 11 – 4 9= –2 5 + 1 = 11 5 2 = 11 – 6 11 = 10 + 6 + 9 = 11 Fact family: 11, 8, 3 Fact family: 11, 7, 4 1 8= – 2 3+8= 3 1 = 11 – 7 3 = 11 – 3 4 11 – 8 = 8 2 + 4 = 11 5 = 11 – 6 8+3= 3 7 = 11 – 4 4= –7 5 11 – =4 6 4+7= Fact family: 11, 6, 5 Fact family: 12, 12, 0 1 5 + = 11 2 11 – 5 = 1 12 = 12 + 3 = 11 – 6 4 6+5= 2 0 = 12 – 5 =5+6 6 6 = 11 – 3 12 = 12 – 4 12 + = 12 5 12 – 0 = 6 – 0 = 12 3 Fact Family: 9–19 Grade 4_Maths.indb 3 07-11-2018 17:08:20
Fact families of 12 Fact family: 12, 11, 1 Fact family: 12, 10, 2 1 12 = 2 + 1 12 – = 11 2 2 + 10 = 3 – 10 = 2 2 – 1 = 11 4 = 12 – 10 5 10 = 12 – 3 1 + 11 = 6 + 10 = 12 4 = 12 – 11 5 1 = 12 – 6 = 1 + 11 Fact family: 12, 9, 3 Fact family: 12, 8, 4 1 12 – 3 = 1 4 + = 12 2 9 = 12 – 2 8 + = 12 3 =9+ 3 3 =8+4 4 3+9= 3 4 12 – =8 9 5 12 – = 5 12 – 8 = 6 = 12 – 6 –8=4 Fact family: 12, 7, 5 Fact family: 12, 6, 6 1 –6=6 1 5 = 12 – 2 6 = 12 – 3 12 = 6 + 2 12 – =5 4 12 – 6 = 5 6 + = 12 3 –7=5 6 =6+6 4 7 + = 12 5 = 12 – 5 6 7= –5 4 Grade 4_Maths.indb 4 07-11-2018 17:08:21
Fact families of 13 Fact family: 13, 13, 0 Fact family: 13, 12, 1 1 0 = – 13 2 – 13 = 0 1 13 = + 12 3 = 13 + 0 4 13 – 0 = 2 13 – =1 5 13 = 0 + 6 0 + = 13 3 13 – 12 = 4 = 12 + 1 5 = 13 – 1 6 12 + 1 = Fact family: 13, 11, 2 Fact family: 13, 10, 3 1 13 – 11 = 1 3 = – 10 2 = 13 – 2 2 10 + 3 = 3 13 – = 11 3 3 + = 13 4 + 2 = 13 4 3 = 13 – 5 13 = 2 + 5 13 – = 10 6 11 = 13 – 6 13 – 10 = Fact family: 13, 9, 4 Fact family: 13, 8, 5 1 5 + = 13 1 4 + = 13 2 8+5= 3 = 13 – 5 2 13 – =9 4 8= –5 5 + 5 = 13 3 =9+4 6 5 = 13 – 4 13 – =4 5 13 = +9 6 9+4= 5 Fact Family: 9–19 Grade 4_Maths.indb 5 07-11-2018 17:08:23
Fact families of 13, 14 Fact family: 13, 7, 6 Fact family: 14, 14, 0 1 6= –7 1 0 + 14 = 2 6+7= 2 = 14 – 14 3 13 = +7 3 14 = +0 4 13 – 7 = 4 14 – = 14 5 7 + = 13 5 – 0 = 14 6 13 – =7 6 + 10 = 12 Fact family: 14, 13, 1 Fact family: 14, 12, 2 1 1 = – 13 1 2 = 14 – 2 1 + 13 = 2 14 = 12 + 3 1 + = 14 3 + 12 = 14 4 14 – 1 = 4 14 – =2 5 13 = –1 5 2 + = 14 6 = 14 – 13 6 + 2 = 14 Fact family: 14, 11, 3 Fact family: 14, 10, 4 1 = 14 – 3 1 10 = 14 – 2 14 = +3 2 14 – =4 3 3 + 11 = 3 = 14 – 4 4 + 3 = 14 4 14 – 10 = 5 14 = + 11 5 10 + = 14 6 + 11 = 14 6 14 = 4 + 6 Grade 4_Maths.indb 6 07-11-2018 17:08:24
Fact families of 14, 15 Fact family: 14, 9, 5 Fact family: 14, 8, 6 1 5= –9 1 –6=8 2 = 14 – 5 2 6 = 14 – 3 14 = +9 3 8 + = 14 4 –9=5 4 14 = +8 5 + 9 = 14 5 14 = 8 + 6 14 = 9 + 6 14 = +6 Fact family: 14, 7, 7 Fact family: 15, 15, 0 1 –7=7 1 = 15 – 0 2 14 – =7 2 15 = 15 + 3 7 + = 14 3 = 15 + 0 4 7+7= 4 0 + 15 = 5 7= –7 5 15 = 15 – 6 = 14 – 7 6 15 – = 15 Fact family: 15, 14, 1 Fact family: 15, 13, 2 1 14 + 1 = 1 15 = 13 + 2 15 = + 14 2 = 15 – 13 3 – 1 = 14 3 13 + = 15 4 1 + = 15 4 2 + 13 = 5 15 – 1 = 5 = 2 + 13 6 15 = 1 + 6 15 = 2 + 7 Fact Family: 9–19 Grade 4_Maths.indb 7 07-11-2018 17:08:25
Fact families of 15, 16 Fact family: 15, 12, 3 Fact family: 15, 11, 4 1 12 + = 15 1 = 11 + 4 2 15 – 12 = 2 15 = + 11 3 3 + = 15 3 15 = 4 + 4 15 – 3 = 4 + 4 = 15 5 12 = –3 5 15 – 4 = 6 15 = +3 6 15 – =4 Fact family: 15, 10, 5 Fact family: 15, 9, 6 1 5 = 15 – 1 6= – 9 6 2 15 – =5 2 = 15 – 9 9 3 = 10 + 5 3 –6= 6 6 4 10 = –5 4 15 = + 5 15 = + 10 5 15 – = 6 = 5 + 10 6 =9+ Fact family: 15, 8, 7 Fact family: 16, 16, 0 1 =8+7 1 16 = 16 – 2 8 + = 15 2 16 = +0 3 15 = +8 3 16 = –0 4 15 – =8 4 16 – = 16 5 8 = 15 – 5 – 0 = 16 6 15 – =7 6 0 + 16 = 8 Grade 4_Maths.indb 8 07-11-2018 17:08:26
Fact families of 16 Fact family: 16, 15, 1 Fact family: 16, 14, 2 1 1 + = 16 1 14 = –2 2 16 = 1 + 2 14 = 16 – 3 15 = –1 3 = 16 – 14 4 = 16 – 15 4 2 + = 16 5 16 = +1 5 = 2 + 14 6 16 – 1 = 6 16 = +2 Fact family: 16, 13, 3 Fact family: 16, 12, 4 1 + 13 = 16 1 + 4 = 16 2 = 3 + 13 2 4 = 16 – 3 13 + = 16 3 12 + = 16 4 3 = 16 – 4 + 12 = 16 5 16 – 13 = 5 16 = +4 6 = 16 – 13 6 = 4 + 12 Fact family: 16, 11, 5 Fact family: 16, 10, 6 1 5 + 11 = 1 6 + 10 = 2 16 – 11 = 2 10 + = 16 3 16 = 5 + 3 6 = – 10 4 16 – = 11 4 16 = +6 5 – 5 = 11 5 + 10 = 16 6 16 = +5 6 10 = –6 9 Fact Family: 9–19 Grade 4_Maths.indb 9 07-11-2018 17:08:28
Fact families of 16, 17 Fact family: 16, 9, 7 Fact family: 16, 8, 8 1 16 = 9 + 1 8 = 16 – 2 9 + = 16 2 8+8= 3 16 – =9 3 16 = 8 + 4 16 – 7 = 4 16 = +8 5 16 = +9 5 + 8 = 16 6 =7+9 6 16 – =8 Fact family: 17, 17, 0 Fact family: 17, 16, 1 1 17 = –0 1 17 = +1 2 – 0 = 17 2 17 – 16 = 3 17 + = 17 3 – 1 = 16 4 17 = 17 – 4 + 1 = 17 5 17 – = 17 5 = 17 – 16 6 17 – 0 = 6 17 – = 16 Fact family: 17, 15, 2 Fact family: 17, 14, 3 1 3 + 14 = 1 15 = 17 – 2 17 = 3 + 3 = 17 – 14 2 = 17 – 2 4 + 3 = 17 5 3 = – 14 3 + 15 = 17 6 – 3 = 14 4 17 – 2 = 5 15 = –2 6 15 + 2 = 10 Grade 4_Maths.indb 10 07-11-2018 17:08:30
Fact families of 17, 18 Fact family: 17, 13, 4 Fact family: 17, 12, 5 1 4 = 17 – 1 17 – =5 2 17 – 4 = 2 + 5 = 17 3 13 + 4 = 3 + 12 = 17 4 4= – 13 4 5 + = 17 5 17 = +4 5 12 = –5 6 – 4 = 13 6 5 + 12 = Fact family: 17, 11, 6 Fact family: 17, 10, 7 1 + 6 = 17 1 10 = –7 2 + 11 = 17 2 + 7 = 17 3 = 6 + 11 3 10 + = 17 4 11 + 6 = 4 17 = 10 + 5 17 = 6 + 5 7 = 17 – 6 17 = + 11 6 = 10 + 7 Fact family: 17, 9, 8 Fact family: 18, 18, 0 1 17 – 8 = 1 18 = + 18 2 9 + = 17 2 – 0 = 18 3 17 = +8 3 18 = 18 – 4 17 – =8 4 18 = +0 5 17 – 9 = 5 18 – 18 = 6 = 17 – 8 6 18 + 0 = 11 Fact Family: 9–19 Grade 4_Maths.indb 11 07-11-2018 17:08:31
Fact families of 18 Fact family: 18, 17, 1 Fact family: 18, 16, 2 1 18 = +1 1 16 = –2 2 1 = 18 – 2 2 = – 16 3 1 + = 18 3 18 = + 16 4 17 + = 18 4 + 2 = 18 5 = 18 – 1 5 = 18 – 16 6 – 1 = 17 6 18 = 16 + Fact family: 18, 15, 3 Fact family: 18, 14, 4 1 18 – = 15 1 14 = 18 – 2 15 + = 18 2 18 – 14 = 3 + 15 = 18 3 + 4 = 18 4 15 + 3 = 4 14 + = 18 5 18 – 3 = 5 18 = +4 6 + 3 = 18 6 = 18 – 14 Fact family: 18, 13, 5 Fact family: 18, 12, 6 1 = 12 + 6 1 13 = –5 2 18 – 12 = 3 = 6 + 12 2 = 18 – 13 4 12 = 18 – 5 6 = – 12 3 13 + 5 = 6 18 = 12 + 4 + 13 = 18 5 + 5 = 18 6 13 = 18 – 12 Grade 4_Maths.indb 12 07-11-2018 17:08:33
Fact families of 18, 19 Fact family: 18, 11, 7 Fact family: 18, 10, 8 1 11 + = 18 1 8 + = 18 2 18 – 7 = 2 = 10 + 8 3 18 = 7 + 3 10 + 8 = 4 = 7 + 11 4 10 + = 18 5 + 7 = 18 5 – 10 = 8 6 18 – = 11 6 18 = 8 + Fact family: 18, 9, 9 Fact family: 19, 19, 0 1 9+9= 1 0 = 19 – 2 18 = 9 + 2 19 = + 19 3 18 – 9 = 3 19 + 0 = 4 9= – 9 4 19 – = 19 9 5 =9+ 5 0 = – 19 6 9 = 18 – 6 19 – =0 Fact family: 19, 18, 1 Fact family: 19, 17, 2 1 1 = – 18 2 19 – 18 = 1 = 17 + 2 3 – 18 = 1 4 19 = 1 + 2 17 + 2 = 5 19 = 18 + 6 = 18 + 1 3 19 – 2 = 4 2 = 19 – 5 – 2 = 17 6 19 = +2 13 Fact Family: 9–19 Grade 4_Maths.indb 13 07-11-2018 17:08:35
Fact families of 19 Fact family: 19, 16, 3 Fact family: 19, 15, 4 1 + 16 = 19 1 – 4 = 15 2 = 19 – 3 2 + 15 = 19 3 19 – = 16 3 4 + 15 = 4 3= – 16 4 15 + 4 = 5 = 19 – 16 5 15 = 19 – 6 19 – 16 = 6 15 + = 19 Fact family: 19, 14, 5 Fact family: 19, 13, 6 1 5 + = 19 2 – 5 = 14 1 19 = +6 3 = 14 + 5 4 19 – 14 = 2 13 = 19 – 5 19 = 14 + 6 5 + 14 = 3 19 = 6 + 4 19 – = 13 5 + 6 = 19 6 6 = 19 – Fact family: 19, 12, 7 Fact family: 19, 11, 8 1 19 = 7 + 1 19 = 8 + 2 – 12 = 7 2 = 19 – 8 3 + 12 = 19 3 8 = 19 – 4 19 – 12 = 4 – 11 = 8 5 = 19 – 7 5 11 + 8 = 6 = 7 + 12 6 = 19 – 11 14 Grade 4_Maths.indb 14 07-11-2018 17:08:36
Fact family of 19 4 10 + = 19 Fact family: 19, 10, 9 5 + 9 = 19 1 = 10 + 9 2 10 = 19 – 6 + 10 = 19 3 = 19 – 10 Complete the following Time: facts. 8 minutes 1 7+5= 11 = 11 – 2 2 14 – 9 = 3 4 + = 10 12 + 0 = 9 4 7= –6 5 = 12 – 9 13 9 = –4 6 9– =2 7 –7=4 14 = 17 – 9 8 18 = 9 + 9 –9=7 15 – 9 = 9 10 7 = 14 – 16 9 + 3 = Grade 4_Maths.indb 15 17 9 = 15 – 18 7 = –7 19 12 = +7 20 – 5 = 8 15 Fact Family: 9–19 07-11-2018 17:08:37
21 8 + 8 = 44 = 7 + 8 22 10 = +5 45 9 = 18 – 23 = 9 + 6 46 9 = 19 – 24 11 = +9 47 4 = –7 25 – 6 = 5 48 6 + = 15 26 + 9 = 9 49 8 + = 12 27 – 10 = 9 50 10 = 7 + 28 12 – =5 51 9 = +4 29 2 = –8 52 19 = 10 + 30 11 – 2 = 53 14 = +9 31 + 9 = 17 54 17 – 8 = 32 – 8 = 9 55 = 8 + 2 33 7 + = 13 56 – 9 = 3 34 13 – 6 = 57 9 = 10 – 35 = 15 – 9 58 11 – =6 36 – 6 = 4 59 6 + 8 = 37 16 = +7 60 = 7 + 7 38 8 = 16 – 61 15 = 8 + 39 9 = –9 62 15 = 6 + 40 + 8 = 10 63 5 = –5 41 = 15 – 8 64 1 = –8 42 14 = +5 65 9 + 8 = 43 + 6 = 11 66 19 – 10 = 16 Grade 4_Maths.indb 16 07-11-2018 17:08:39
Let us learn Complete the following facts. 1 90 = 180 – 21 180 = 90 + 2 80 + = 160 22 – 0 = 90 3 110 = + 60 23 120 – = 30 4 100 – 50 = 24 90 + = 180 5 190 = + 100 25 90 = 120 – 6 60 + = 100 26 90 + = 170 7 90 = 170 – 27 90 = – 70 8 = 50 + 80 28 100 – 10 = 9 110 = + 20 29 80 + 90 = 10 50 + = 130 30 90 + 90 = 11 = 90 + 10 31 150 – 90 = 12 140 = 80 + 32 = 180 – 90 13 180 – 90 = 33 60 + = 130 14 80 = – 90 34 180 – = 90 15 = 110 – 40 35 90 + 40 = 16 = 90 – 0 36 160 – 70 = 17 70 + 20 = 37 + 50 = 140 18 160 – = 70 38 90 = – 90 19 60 = 140 – 39 120 = + 90 20 160 – = 80 40 50 = 140 – 17 Fact Family: 9–19 Grade 4_Maths.indb 17 07-11-2018 17:08:41
41 – 70 = 20 64 = 90 + 80 42 – 80 = 80 65 70 = – 20 43 = 90 – 40 66 100 – = 40 44 = 190 – 100 67 130 = + 70 45 90 – 10 = 68 130 = 50 + 46 80 + 80 = 69 90 = + 80 47 140 = + 50 70 160 – 80 = 48 70 = – 60 71 140 – = 80 49 90 = – 60 72 70 + = 90 50 – 90 = 50 73 70 = 140 – 51 170 – 80 = 74 = 170 – 90 52 – 20 = 90 75 130 = 40 + 53 90 – =0 76 50 = – 40 54 80 = 120 – 77 30 + 70 = 55 – 70 = 70 78 140 = 60 + 56 80 = 160 – 79 190 = 100 + 57 100 = – 90 80 – 70 = 80 58 160 – = 90 81 70 + = 100 59 170 = 80 + 82 + 90 = 180 60 – 80 = 40 83 60 + = 130 61 60 + 70 = 84 140 – 60 = 62 110 – = 30 85 160 = 70 + 63 120 – 90 = 86 = 110 – 30 18 Grade 4_Maths.indb 18 07-11-2018 17:08:44
BREAKING DOWN NUMBERS Let us revise Expand the following numbers as shown. = Thousands = Tens = Hundreds = Ones 1 6017= 6 +0 +1 +7 2 4224= + + + 3 1557= + + + 4 6399= + + + 5 1935= + + + 6 6459= + + + 7 1455= + + + 8 3699= + + + 9 8239= 8 +2 +9 +3 10 4 1 1 2 = + + + 11 3 5 9 8 = + + + 12 4 2 5 8 = + + + 13 5 9 8 1 = + + + 14 2 0 4 6 = + + + 19 Grade 4_Maths.indb 19 07-11-2018 17:08:48
Solve the following problems. 2 3651 –3350 1 2570 +4420 3 7444 4 6100 –3595 +1754 5 8350 6 9876 –1720 +8103 7 6054 8 4777 +3101 –1219 9 4017 10 2 1 5 6 +5781 –1597 11 6 9 8 9 12 5 9 8 0 +6026 –4180 20 07-11-2018 17:08:50 Grade 4_Maths.indb 20
13 2 0 9 7 14 7 4 6 4 –1082 –1769 15 5 1 8 9 16 7 8 8 4 –4023 +2014 17 2 0 0 5 18 9 6 5 4 –1056 +5121 19 3 2 7 3 20 1 2 9 3 –3220 +9108 21 3 4 3 1 22 3 0 5 1 –1131 –1001 23 8 4 1 0 24 8 2 2 9 –2100 –5202 Grade 4_Maths.indb 21 21 Breaking Down Numbers 07-11-2018 17:08:52
Let us learn Expand the following numbers as shown. = Ten Thousands = Hundreds = Ones = Thousands = Tens 1 52113 = 5 +2 +1 +1 +3 2 61351 = + + + + 3 35038 = + + + + 4 13674 = + + + + 5 37934 = + + + + 6 86552 = + + + + 7 76872 = + + + + 8 82586 = + + + + 9 30913 = + + + + 10 7 4 1 4 3 = 4 +1 +4 +3 +7 11 3 3 8 5 9 = + + + + 12 5 6 0 0 7 = + + + + 13 1 1 3 7 6 = + + + + 14 2 1 8 9 1 = + + + + 15 9 0 4 6 1 = + + + + 16 4 7 6 9 5 = + + + + 17 9 0 4 9 4 = + + + + 18 8 0 3 7 0 = + + + + 22 Grade 4_Maths.indb 22 07-11-2018 17:08:55
Solve the following problems. 2 42038 –32015 1 34476 –14266 3 30328 4 69701 +10001 –59751 5 45227 6 73022 +73298 –70001 7 77382 8 82454 +10002 +90597 9 95584 10 7 0 8 0 4 +14395 +13012 11 3 8 4 1 4 12 3 4 6 8 1 –37010 –26007 Grade 4_Maths.indb 23 23 Breaking Down Numbers 07-11-2018 17:08:56
13 8 7 8 3 3 14 7 3 0 3 2 –65836 +11510 15 2 2 8 6 3 16 2 6 8 9 0 +58218 –13440 17 6 0 7 7 1 18 1 5 4 3 6 –20550 +91816 19 7 3 3 0 4 20 5 5 5 2 5 +24864 +40430 21 1 6 0 9 1 22 4 0 4 7 4 +50003 +69567 23 5 9 4 9 2 24 3 2 0 6 6 +10402 –21001 24 07-11-2018 17:08:57 Grade 4_Maths.indb 24
Round off to the nearest Round off to the nearest tens. hundreds. 1 488 = 490 1 7956 = 8000 2 783 = 2 7237 = 3 586 = 3 2619 = 4 325 = 4 4577 = 5 193 = 5 4458 = 6 946 = 6 1731 = 7 651 = 7 2144 = 8 823 = 8 6435 = 9 482 = 9 9334 = 10 557 = 10 2395 = 11 478 = 11 8149 = 12 174 = 12 6753 = 13 834 = 13 8844 = 14 449 = 14 5388 = 15 796 = 15 7584 = 16 448 = 16 9254 = 17 451 = 17 3122 = 18 412 = 18 3322 = 19 534 = 19 4988 = 20 946 = 20 6966 = Grade 4_Maths.indb 25 25 Breaking Down Numbers 07-11-2018 17:08:58
Estimate your answer to the nearest tens. Example: 724 – 518 = 720 – 520 = 200 1 875 – 697 = 9 523 – 421 = 2 552 – 452 = 10 967 + 691 = 3 445 + 568 = 11 685 – 527 = 4 938 – 463 = 12 745 – 238 = 5 876 – 857 = 13 266 – 251 = 6 474 –187 = 14 978 – 438 = 7 797 + 281 = 15 598 + 976 = 8 643 + 598 = 16 719 + 621 = Estimate your answer to the nearest hundreds. 1 3447 + 7694 = 11100 9 9798 + 4593 = 2 7377 + 6455 = 10 8695 + 4814 = 3 9479 – 1362 = 11 8874 – 2338 = 4 7795 + 6829 = 12 6727 + 6511 = 5 4459 – 1434 = 13 6119 + 7197 = 6 7648 – 1314 = 14 9473 – 6949 = 7 2898 – 1423 = 15 1938 + 6786 = 8 7733 – 2487 = 16 4971 – 4267 = 26 07-11-2018 17:09:00 Grade 4_Maths.indb 26
Skip Counting 27 Let us revise 07-11-2018 17:09:02 Practise skip counting: 2 to 8 Complete the series. 1 81, ___ , ___ , ___ , 65, ___ , 57, 53, 49, 45, 41 2 8, 14, 20, ___ , ___ , 38, 44, ___ , ___ , 62, 68 3 114, 107, 100, ___ , ___ , ___ , ___ , 65, 58, 51, 44 4 92, 88, 84, 80, ___ , ___ , ___ , 64, 60, ___ , 52 5 79, 74, 69, ___ , 59, 54, ___ , 44, 39, ___ , 29 6 83, 76, ___ , 62, ___ , ___ , ___ , 34, 27, 20, 13 7 116, ___ , ___ , 101, ___ , ___ , 86, 81, 76, 71, 66 8 27, 32, ___ , 42, ___ , ___ , ___ , 62, 67, 72, 77 9 77, ___ , 71, ___ , 65, ___ , ___ , 56, 53, 50, 47 10 112, 110, ___ , ___ , 104, ___ , 100, ___ , 96, 94, 92 11 117, ___ , 111, 108, ___ , ___ , 99, 96, 93, 90, 87 12 108, 101, 94, ___ , ___ , 73, ___ , 59, ___ , 45, 38 13 5, 13, ___ , ___ , 37, ___ , 53, 61, 69, 77, 85 14 99, ___ , ___ , 90, 87, 84, ___ , ___ , 75, 72, 69 15 17, ___ , ___ , 32, ___ , ___ , 47, 52, 57, 62, 67 16 81, 77, 73, 69, ___ , ___ , ___ , 53, ___ , 45, 41 Grade 4_Maths.indb 27
Practise skip counting: 2 to 8 Fill in the blanks. 1 The series 21, 28, 35, 42 represents skip counting by ____. 2 The series 8, 13, 18, 23 represents skip counting by ____. 3 The series 86, 81, 76, 71 represents skip counting by ____. 4 The series 92, 86, 80, 74 represents skip counting by ____. 5 The series 17, 21, 25, 29 represents skip counting by ____. 6 The series 12, 20, 28, 36 represents skip counting by ____. 7 The series 27, 25, 23, 21 represents skip counting by ____. 8 The series 91, 83, 75, 67 represents skip counting by ____. 9 The series 21, 29, 37, 45 represents skip counting by ____. 10 The series 97, 93, 89, 85 represents skip counting by ____. 11 The series 83, 80, 77, 74 represents skip counting by ____. 12 The series 93, 87, 81, 75 represents skip counting by ____. 13 The series 79, 72, 65, 58 represents skip counting by ____. Show skip counting on the number line. 1 Skip count by 4: Start at 34 and skip count backwards 2 times. 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 28 Grade 4_Maths.indb 28 07-11-2018 17:09:04
2 Skip count by 5: Start at 38 and skip count backwards 3 times. 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 3 Skip count by 4: Start at 9 and skip count forwards 2 times. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 4 Skip count by 3: Start at 6 and skip count forwards 9 times. 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 5 Skip count by 6: Start at 17 and skip count forwards 3 times. 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 6 Skip count by 6: Start at 23 and skip count backwards 3 times. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 29 Skip Counting Grade 4_Maths.indb 29 07-11-2018 17:09:06
7 Skip count by 3: Start at 18 and skip count forwards 9 times. 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 8 Skip count by 7: Start at 9 and skip count forwards 2 times. 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 9 Skip count by 4: Start at 21 and skip count backwards 5 times. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 10 Skip count by 6: Start at 15 and skip count forwards 3 times. 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 11 Skip count by 5: Start at 35 and skip count backwards 3 times. 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 30 Grade 4_Maths.indb 30 07-11-2018 17:09:07
Repeated addition 31 Let us revise 07-11-2018 17:09:09 Practise repeated addition: 2 to 8 Fill in the blanks. 1 5 + 5 + 5 + 5 + 5 + 5 + 5 = ___ 2 4 + 4 + 4 + 4 + 4 = ___ 3 4 + 4 = ___ 4 7 + 7 + 7 + 7 + 7 + 7 = ___ 5 2 + 2 + 2 = ___ 6 8 + 8 + 8 + 8 + 8 + 8 = ___ 7 4 + 4 + 4 = ___ 8 3 + 3 + 3 = ___ 9 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 = ___ 10 8 + 8 + 8 + 8 = ___ Complete the missing numbers. 1 7 × ___ = 7 + 7 + 7 + 7 + 7 + 7 2 2 + 2 + 2 + 2 + 2 + 2 = 2 × ___ 3 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 = 6 × ___ 4 8 × ___ = 8 + 8 + 8 + 8 Grade 4_Maths.indb 31
5 4 × ___ = 4 + 4 + 4 6 3 + 3 + 3 = 3 × ___ 7 8 + 8 + 8 + 8 + 8 + 8 = 8 × ___ 8 7 × ___ = 7 + 7 + 7 + 7 + 7 9 2 + 2 + 2 + 2 = 2 × ___ 10 2 × ___ = 2 + 2 11 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 = 6 × ___ 12 7 × ___ = 7 + 7 + 7 + 7 + 7 Write an expression to count the total number of blocks given below. 1 7+7=7×2 Solution: 2 Solution: 07-11-2018 17:09:11 32 Grade 4_Maths.indb 32
3 33 Solution: Repeated Addition 4 Solution: 07-11-2018 17:09:13 5 Solution: 6 Solution: 7 Solution: Grade 4_Maths.indb 33
8 07-11-2018 17:09:13 Solution: 9 Solution: 10 Solution: 11 Solution: 12 Solution: 34 Grade 4_Maths.indb 34
Let us LEARN Conversion of multiplication facts Solve the following questions. 1 8 × 7 = 7+7+7+7+7+7+7+7 = 8 + 8 + 8 + 8 + 8 + 8 + 8 = 7 × 8 = 56 2 × 2 = 2+2+2+2+2+2+2 = = ×7= 3 7× = 7+7+7+7+7 = =5× = 4 ×4= = 4+4+4+4+4+4+4+4 = × 8 = 5 ×5= = 3+3+3+3+3 = × 3 = 6 ×4= = 3+3+3+3+3 = × 3 = 7 × 7 = 8+8+8+8+8+8+8 = =8× = 8 7× = = 4+4+4+4+4+4+4 = 4 × = 35 Repeated Addition Grade 4_Maths.indb 35 07-11-2018 17:09:14
9 ×3= 3 + 3 + 3 +3 = = ×4= 10 2 × = 5+5 =5× = = 11 × 8 = = 3+3+3+3+3+3+3+3 = × 3 = 12 × 7 = 7+7 = = ×2= 13 × 4 = 4 + 4 + 4 + 4 + 4 + 4 + 4 = = ×7= 14 6 × = = 4+4+4+4+4+4 = 4 × = 15 4 × = 2+2+2+2 = ×2= = 16 ×5= 4+4+4+4+4 = = ×4= 17 ×7= 7+7+7+7+7 = = ×5= 18 × 6 = = 8+8+8+8+8+8 = × 8 = 36 07-11-2018 17:09:16 Grade 4_Maths.indb 36
Repeated subtraction 37 Let us REVISE 07-11-2018 17:09:18 Practise repeated subtraction: 2 to 8 Fill in the blanks. 1 68 – 4 – 4 – 4 – 4 – 4 – 4 – 4 – 4 – 4 = ___ 2 33 – 3 – 3 – 3 = ___ 3 30 – 2 – 2 – 2 – 2 – 2 = ___ 4 18 – 2 – 2 – 2 = ___ 5 50 – 5 – 5 – 5 – 5 – 5 – 5 = ___ 6 60 – 6 – 6 – 6 – 6 – 6 = ___ 7 48 – 4 – 4 = ___ 8 80 – 8 – 8 – 8 – 8 – 8 – 8 – 8 – 8 = ___ 9 63 – 7 – 7 – 7 – 7 – 7 – 7 – 7 = ___ 10 27 – 3 – 3 – 3 = ___ Complete the missing numbers. 1 20 – ( 2 × ___ ) = 20 – 2 2 136 – ( 8 × ___ ) = 136 – 8 – 8 – 8 – 8 – 8 – 8 – 8 – 8 – 8 3 70 – 7 – 7 – 7 – 7 – 7 = 70 – ( 7 × ___ ) 4 40 – ( 4 × ___ ) = 40 – 4 – 4 – 4 – 4 – 4 – 4 Grade 4_Maths.indb 37
5 77 – ( 7 × ___ ) = 77 – 7 6 33 – 3 – 3 – 3 – 3 – 3 = 33 – ( 3 × ___ ) 7 98 – ( 7 × ___ ) = 98 – 7 – 7 – 7 – 7 – 7 – 7 – 7 – 7 – 7 8 45 – ( 5 × ___ ) = 45 – 5 – 5 – 5 – 5 9 18 – 2 – 2 – 2 – 2 = 18 – ( 2 × ___ ) 10 78 – ( 6 × ___ ) = 78 – 6 11 52 – 2 – 2 = 52 – ( 2 × ___ ) 12 18 – 2 – 2 – 2 – 2 – 2 – 2 – 2 – 2 = 18 – ( 2 × ___ ) Write an expression to show the repeated subtraction shown on the number line. 1 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 Solution: 2 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 Solution: 38 07-11-2018 17:09:20 Grade 4_Maths.indb 38
3 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 67 Solution: 4 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 Solution: 5 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 Solution: 6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Solution: 7 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Solution: 39 Repeated Subtraction Grade 4_Maths.indb 39 07-11-2018 17:09:21
Let us learn Dividing numbers by 1 Divide the following 3-digit numbers by 1. 1 819 ÷ = 819 6 ÷ 1 = 191 2 258 ÷ 1 = 7 565 ÷ = 565 3 ÷ 1 = 224 8 184 ÷ 1 = 4 573 ÷ 1 = 9 ÷ 1 = 546 5 ÷ 1 = 162 10 ÷ 1 = 772 Divide the following 4-digit numbers by 1. 1 ÷ 1 = 1562 6 8736 ÷ = 8736 2 4656 ÷ = 4656 7 8398 ÷ 1 = 3 ÷ 1 = 2887 8 8855 ÷ 1 = 4 ÷ 1 = 5298 9 4941 ÷ 1 = 5 3884 ÷ 1 = 10 ÷ 1 = 9358 Divide the following 5-digit numbers by 1. 1 52375 ÷ = 52375 6 68517 ÷ 1 = 7 47756 ÷ 1 = 2 ÷ 1 = 39413 8 ÷ 1 = 75912 9 76328 ÷ 1 = 3 19322 ÷ = 19322 10 75346 ÷ 1 = 4 38449 ÷ 1 = 5 23851 ÷ 1 = 40 Grade 4_Maths.indb 40 07-11-2018 17:09:22
Multiplication tableS Let us revise Fill in the blanks. 8 3 Practise table of 1 1 7×1= 2 ×1= 2 Complete the table. 3 5×1= 4 ×1= 1 1×1= 5 1×1= 2 1×2= 6 4×1= 3 1×3= 7 ×1= 4 1×4= 8 6×1= 5 1×5= 9 9×1= 6 1×6= 10 10 × 1 = 7 1×7= 8 1×8= 9 1×9= 10 1 × 10 = Solve the following. 1 40 ÷ 1 = 6 100 ÷ 1 = 2 60 ÷ 1 = 7 1000 ÷ 1 = 3 80 ÷ 1 = 8 20 ÷ 1 = 4 500 ÷ 1 = 9 700 ÷ 1 = 5 300 ÷ 1 = 10 90 ÷ 1 = 41 Grade 4_Maths.indb 41 07-11-2018 17:09:25
Practise table of 2 Fill in the blanks. Complete the table. 1 × 2 = 16 2 5×2= 1 2×1= 3 × 2 = 12 2 2×2= 4 10 × 2 = 3 2×3= 5 2×2= 4 2×4= 6 × 2 = 14 5 2×5= 7 ×2= 8 6 2×6= 8 ×2= 6 7 2×7= 9 × 2 = 18 8 2×8= 10 × 2 = 2 9 2×9= 10 2 × 10 = 6 60 ÷ 2 = 7 1800 ÷ 2 = Solve the following. 8 100 ÷ 2 = 9 160 ÷ 2 = 1 200 ÷ 2 = 10 2000 ÷ 2 = 2 1200 ÷ 2 = 3 140 ÷ 2 = 07-11-2018 17:09:27 4 800 ÷ 2 = 5 400 ÷ 2 = 42 Grade 4_Maths.indb 42
Practise table of 3 Fill in the blanks. Complete the table. 1 × 3 = 30 2 3×3= 1 3×1= 3 × 3 = 27 2 3×2= 4 × 3 = 21 3 3×3= 5 × 3 = 15 4 3×4= 6 6×3= 5 3×5= 7 1×3= 6 3×6= 8 ×3= 6 7 3×7= 9 4×3= 8 3×8= 10 8 × 3 = 9 3×9= 10 3 × 10 = 6 2700 ÷ 3 = 7 1800 ÷ 3 = Solve the following. 8 3000 ÷ 3 = 9 900 ÷ 3 = 1 210 ÷ 3 = 10 240 ÷ 3 = 2 150 ÷ 3 = 3 600 ÷ 3 = 43 4 300 ÷ 3 = 5 120 ÷ 3 = Multiplication Tables Grade 4_Maths.indb 43 07-11-2018 17:09:29
Practise table of 4 Fill in the blanks. Complete the table. 1 2×4= 2 ×4= 4 1 4×1= 3 × 4 = 40 2 4×2= 4 7×4= 3 4×3= 5 3×4= 4 4×4= 6 × 4 = 32 5 4×5= 7 × 4 = 16 6 4×6= 8 5×4= 7 4×7= 9 9×4= 8 4×8= 10 6 × 4 = 9 4×9= 10 4 × 10 = 6 2800 ÷ 4 = 7 3600 ÷ 4 = Solve the following. 8 3200 ÷ 4 = 9 240 ÷ 4 = 1 4000 ÷ 4 = 10 80 ÷ 4 = 2 120 ÷ 4 = 3 2000 ÷ 4 = 07-11-2018 17:09:29 4 160 ÷ 4 = 5 400 ÷ 4 = 44 Grade 4_Maths.indb 44
Practise table of 5 Fill in the blanks. Complete the table. 1 × 5 = 25 2 9×5= 1 5×1= 3 2×5= 2 5×2= 4 × 5 = 50 3 5×3= 5 7×5= 4 5×4= 6 × 5 = 20 5 5×5= 7 6×5= 6 5×6= 8 3×5= 7 5×7= 9 8×5= 8 5×8= 10 1 × 5 = 9 5×9= 10 5 × 10 = 6 4500 ÷ 5 = 7 150 ÷ 5 = Solve the following. 8 3000 ÷ 5 = 9 3500 ÷ 5 = 1 400 ÷ 5 = 10 100 ÷ 5 = 2 500 ÷ 5 = 3 2000 ÷ 5 = 45 4 5000 ÷ 5 = 5 250 ÷ 5 = Multiplication Tables Grade 4_Maths.indb 45 07-11-2018 17:09:30
Practise table of 6 Fill in the blanks. Complete the table. 1 × 6 = 48 2 1×6= 1 6×1= 3 × 6 = 54 2 6×2= 4 6×6= 3 6×3= 5 2×6= 4 6×4= 6 7×6= 5 6×5= 7 10 × 6 = 6 6×6= 8 × 6 = 18 7 6×7= 9 × 6 = 30 8 6×8= 10 4 × 6 = 9 6×9= 10 6 × 10 = 6 600 ÷ 6 = 7 480 ÷ 6 = Solve the following. 8 1200 ÷ 6 = 9 540 ÷ 6 = 1 3000 ÷ 6 = 10 3600 ÷ 6 = 2 180 ÷ 6 = 3 420 ÷ 6 = 07-11-2018 17:09:30 4 2400 ÷ 6 = 5 6000 ÷ 6 = 46 Grade 4_Maths.indb 46
Practise table of 7 Fill in the blanks. Complete the table. 1 × 7 = 14 2 6×7= 1 7×1= 3 × 7 = 49 2 7×2= 4 3×7= 3 7×3= 5 10 × 7 = 4 7×4= 6 4×7= 5 7×5= 7 5×7= 6 7×6= 8 ×7= 7 7 7×7= 9 8×7= 8 7×8= 10 × 7 = 63 9 7×9= 10 7 × 10 = 6 6300 ÷ 7 = 7 7000 ÷ 7 = Solve the following. 8 4200 ÷ 7 = 9 1400 ÷ 7 = 1 490 ÷ 7 = 10 2800 ÷ 7 = 2 3500 ÷ 7 = 3 5600 ÷ 7 = 47 4 2100 ÷ 7 = 5 700 ÷ 7 = Multiplication Tables Grade 4_Maths.indb 47 07-11-2018 17:09:30
Practise table of 8 Fill in the blanks. Complete the table. 1 × 8 = 80 2 × 8 = 40 1 8×1= 3 × 8 = 24 2 8×2= 4 8×8= 3 8×3= 5 7×8= 4 8×4= 6 6×8= 5 8×5= 7 4×8= 6 8×6= 8 × 8 = 16 7 8×7= 9 9×8= 8 8×8= 10 1 × 8 = 9 8×9= 10 8 × 10 = 6 4000 ÷ 8 = 7 160 ÷ 8 = Solve the following. 8 8000 ÷ 8 = 9 480 ÷ 8 = 1 2400 ÷ 8 = 10 5600 ÷ 8 = 2 800 ÷ 8 = 3 3200 ÷ 8 = 07-11-2018 17:09:31 4 6400 ÷ 8 = 5 720 ÷ 8 = 48 Grade 4_Maths.indb 48
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