My NUMBER OPERATIONS Book 3 Name: ___________________________________ Section: ________________ Roll No.: _________ School: __________________________________Number Operations.indb 1 08-11-2018 14:30:26
Contents1 Fact Family: 2–19....................................................... 12 Breaking Down Numbers.......................................... 213 Skip Counting.............................................................294 Repeated Addition................................................... 365 Repeated Subtraction.............................................. 426 Multiplication Tables................................................. 47Number Operations.indb 2 08-11-2018 14:30:27
Fact family: 2–19 Let us revise Complete the fact family for each set of numbers given below.Fact families of 2, 3, 4 Fact family: 2, 1, 1 1 2= +1 Fact family: 2, 2, 0 2 – 1=1 3 1=2– 1 +0=2 4 +1=2 2 2=2– 3 0= –2 Fact family: 3, 2, 1 4 +2=2 1 2+1= 2 3= +1 Fact family: 3, 3, 0 3 2= –1 4 =3–2 1 3+0= Fact family: 4, 3, 1 2 +3=3 1 –3=1 2 4=3+ 3 0= –3 3 4–3= 4 =3+1 4 3=3– Fact family: 4, 4, 0 1 4+0= 2 4= –0 3 –4=0 4 4= +0 1Number Operations.indb 1 08-11-2018 14:30:29
Fact family: 4, 2, 2 2 Fact families of 4, 5, 6 1 4= + 2 2 4– = Fact family: 5, 5, 0 3 4 =2 + 2 1 +0=5 4 =4 – 2 0=5– 3 5=0+ Fact family: 5, 4, 1 4 5– =5 1 –4=1 2 5=1+ Fact family: 5, 3, 2 3 5– =1 1 3+2= 4 +4=5 2 2+3= 3 5– =2 Fact family: 6, 6, 0 0 4 2= –3 1 =6+ 6 2 6– = Fact family: 6, 5, 1 3 6–0= 6 1 1+ =6 4 6= + 2 6= +5 3 =6–1 Fact family: 6, 4, 2 4 6– =1 1 4+2= Fact family: 6, 3, 3 1 3+3= 2 =6–4 2 3= –3 3 6= +3 3 4+ =6 4 6–3= 4 4= –2 08-11-2018 14:30:322Number Operations.indb 2
Fact families of 7, 8 Fact family: 7, 7, 0 7 Fact family: 7, 6, 1 1 –0= 0 1 +1=7 2 7= + 2 7–6= 3 7=7+ 0 3 6= –1 4 –7= 4 +6=7 Fact family: 7, 5, 2 5 Fact family: 7, 4, 3 1 7= + 1 +4=7 2 5+2= 5 2 –3=4 3 =7– 5 3 7=4+ 4 7– = 4 7–3= Fact family: 8, 8, 0 8 Fact family: 8, 7, 1 1 +8= 1 8– =1 2 8–0= 0 2 7+1= 3 =8+ 8 3 7= –1 4 0= – 4 7+ =8 Fact family: 8, 6, 2 2 Fact family: 8, 5, 3 3 1 8– = 8 1 8– = 5 2 +6= 6 2 =3+ 3 8– = 8 3 8–5= 8 4 +2= 4 +3= 3 Fact Family: 2–19Number Operations.indb 3 08-11-2018 14:30:34
Fact families of 8, 9, 10 Fact family: 8, 4, 4 Fact family: 9, 9, 0 1 4+ =8 1 0= –9 2 =8 –4 2 9 –0= 3 4=8 – 3 9= +9 4 4+4= 4 9=9+ Fact family: 9, 8, 1 Fact family: 9, 7, 2 1 1=9 – 1 –2=7 2 9= +8 2 7+ =9 3 8+1= 3 2=9 – 4 9 –8= 4 7+ =9 Fact family: 9, 6, 3 Fact family: 9, 5, 4 1 6+3= 1 9=4+ 2 6= –3 2 4+5= 3 6+ =9 3 5= –4 4 –3=6 4 9 – =4 Fact family: 10, 10, 0 Fact family: 10, 9, 1 1 0 = – 10 2 + 0 = 10 1 = 10 – 1 3 10 + 0 = 4 10 = 10 – 2 1= – 9 5 + 10 = 10 3 10 = 1 +4 4 10 – =9 5 10 = 9 +Number Operations.indb 4 08-11-2018 14:30:35
Fact families of 10 Fact family: 10, 7, 3 1 = 10 – 7 Fact family: 10, 8, 2 2 7 + = 10 1 10 = + 2 3 =7+3 2 + 8 = 10 4 = 10 – 3 3 2= – 8 5 10 – 7 = 4 2 + = 10 5 =2+8 Fact family: 10, 5, 5 1 5+5= Fact family: 10, 6, 4 2 = 10 – 5 1 4 + = 10 3 10 – 5 = 2 6= – 4 4 10 = + 5 3 10 = + 6 5 – 5= 5 4 + 4 = 10 5 = 10 – 4Complete the following facts. Time: 1 minute 1 =1+5 6 +0=8 2 7= +2 3 2+3= 7 0 = – 10 4 –8=1 5 6 = 10 – 8 =4–1Number Operations.indb 5 9 =2–0 10 7 – =3 5 Fact Family: 2–19 08-11-2018 14:30:37
Fact families of 11 Let us learn Complete the fact family for each set of numbers given below. Fact family: 11, 10, 1 Fact family: 11, 9, 2 11 11 10 1 92 1 11 – 10 = 1 11 = + 2 2 10 + = 11 2 2= –9 3 = 11 – 1 3 9 = 11 – 4 1 = 11 – 4 =2+9 5 1 + = 11 5 = 11 – 9 6 11 – 1 = 6 11 = 2 + 7 – 10 = 1 7 11 – =2 8 1 = – 10 8 11 = 9 + 9 11 = + 1 9 11 – =9 10 10 + 1 = 10 2 + 9 = 11 = 11 – 10 11 = 9 + 2 12 1 + 10 = 12 2 + = 11 13 11 – =1 13 11 = + 96Number Operations.indb 6 08-11-2018 14:30:39
Fact families of 11 Fact family: 11, 7, 4 11Fact family: 11, 8, 3 11 83 741 11 = + 3 1 11 – = 72 11 – 8 = 2 4+7=3 8+3= 3 –7=44 =3+8 4 = 11 – 45 3= –8 5 11 = 4 +6 –3=8 6 + 4 = 117 + 8 = 11 7 11 – 7 =8 3 = 11 – 8 =4+79 3+8= 9 11 = 7 +10 8 = – 3 10 4 = 11 –11 8 + = 11 11 = 7 + 412 11 – =8 12 11 – 4 =13 + 3 = 11 13 + 7 = 1114 11 = 3 + 14 11 – =415 3 + = 11 15 4 + = 1116 11 = 8 + 16 4 = – 717 = 11 – 8 17 7 + = 11 7 Fact Family: 2–19Number Operations.indb 7 08-11-2018 14:30:41
Fact family: 11, 6, 5 Fact families of 11, 12 11 Fact family: 12, 10, 2 12 65 10 2 1 11 = + 6 1 10 + 2 = 2 6+5= 2 2 = – 10 3 + 6 = 11 3 + 10 = 12 4 –6=5 4 12 = 2 + 5 5 + = 11 5 – 10 = 2 6 + 5 = 11 6 = 12 – 2 7 11 – 5 = 7 12 – 10 = 8 11 = 6 + 8 = 2 + 10 9 = 11 – 5 9 12 – 2 = 10 5 + 6 = 10 12 – =2 11 = 5 + 6 11 12 = + 2 12 = 6 + 5 12 = 12 – 10 13 5 = 11 – 13 12 – = 10 14 11 = 5 + 14 = 10 + 2 15 = 11 – 6 15 2 + 10 = 16 6 = 11 – 16 10 + = 12 17 11 – =5 17 10 = –28Number Operations.indb 8 08-11-2018 14:30:43
Fact families of 12 Fact family: 12, 8, 4 12 Fact family: 12, 9, 3 12 93 841 = 12 – 9 1 12 = 4 +2 12 – =9 2 =8+43 9+3= 3 8 + = 124 3= –9 4 =4+85 3+9= 5 12 – 4 =6 12 = + 9 6 12 = + 47 12 = + 3 7 8+4=8 12 – =3 8 –4=89 12 – 3 = 9 12 – =410 – 9 = 3 10 4 = 12 –11 12 = 9 + 11 = 12 – 412 – 3 = 9 12 4 + 8 =13 9 = – 3 13 12 = + 814 12 = 3 + 14 + 8 = 1215 3 = 12 – 15 – 8 = 416 9 = 12 – 16 4 + = 1217 12 – 9 = 17 12 – =8 9 Fact Family: 2–19Number Operations.indb 9 08-11-2018 14:30:45
Fact family: 12, 7, 5 Fact families of 12 12 Fact family: 12, 6, 6 12 75 66 1 12 – 5 = 1 6= –6 2 = 12 – 5 2 –6=6 3 + 7 = 12 3 = 12 – 6 4 5 = 12 – 4 6 + = 12 5 12 = 7 + 5 12 – 6 = 6 –7=5 6 12 = + 6 7 12 = + 7 7 + 6 = 12 8 5+7= 8 6 = 12 – 9 12 – 7 = 9 =6+6 10 + 5 = 12 10 12 – =6 11 12 – =7 11 6 + 6 = 12 = 12 – 7 12 12 = 6 + 13 7 + 5 = 14 7 = 12 – 15 12 = 5 + 16 5 + = 12 17 12 = + 510Number Operations.indb 10 08-11-2018 14:30:47
Fact families of 13 Fact family: 13, 9, 4 13 Fact family: 13, 10, 3 13 10 3 941 10 = – 3 1 = 13 – 42 3 = 13 – 2 =9+43 13 – =3 3 =4+94 – 3 = 10 4 9+4=5 3 + = 13 5 13 = + 46 13 = 10 + 6 + 4 = 137 + 10 = 13 7 13 – 4 =8 13 = + 10 8 13 – 9 =9 + 3 = 13 9 13 = 9 +10 = 10 + 3 10 4 + = 1311 10 = 13 – 11 9 = 13 –12 13 – = 10 12 9 + = 1313 13 – 10 = 13 13 = 4 +14 13 = 3 + 14 + 9 = 1315 = 13 – 3 15 4 = 13 –16 – 10 = 3 16 13 – =417 3 + 10 = 17 – 4 = 9 11 Fact Family: 2–19Number Operations.indb 11 08-11-2018 14:30:48
Fact family: 13, 8, 5 Fact families of 13 13 Fact family: 13, 7, 6 13 85 76 1 =5+8 1 + 7 = 13 2 5 = 13 – 2 = 13 – 6 3 8+5= 3 7 + = 13 4 –8=5 4 7= –6 5 =8+5 5 + 6 = 13 6 5 + = 13 6 6= –7 7 = 13 – 5 7 7 = 13 – 8 5+8= 8 13 – = 7 9 13 – 5 = 9 6+7= 10 13 – =5 10 13 – =6 11 13 – =8 11 13 = 7 + 12 + 8 = 13 12 13 = 6 + 13 13 = 5 + 13 6 + = 13 14 13 – 8 = 14 13 – 7 = 15 8 = 13 – 15 13 = + 7 16 13 = + 5 16 6 = 13 – 17 8 = – 5 17 – 7 = 612Number Operations.indb 12 08-11-2018 14:30:50
Fact families of 14 Fact family: 14, 9, 5 14 Fact family: 14, 10, 4 14 10 4 951 14 = + 10 1 5 + = 142 4 = – 10 2 =9+53 14 – 4 = 3 + 9 = 144 = 14 – 4 4 9 = 14 –5 – 4 = 10 5 14 – =96 14 – =4 6 14 – =57 10 + = 14 7 –5=98 14 – = 10 8 –9=59 – 10 = 4 9 5+9=10 14 = + 4 10 = 14 – 511 = 14 – 10 11 5 = 14 –12 = 10 + 4 12 14 = 9 +13 4 = 14 – 13 9 + = 1414 14 – 10 = 14 = 14 – 915 14 = 10 + 15 14 – 9 =16 = 4 + 10 16 9 = – 517 10 = 14 – 17 + 5 = 14 13 Fact Family: 2–19Number Operations.indb 13 08-11-2018 14:30:51
Fact family: 14, 8, 6 Fact families of 14 14 Fact family: 14, 7, 7 14 86 77 1 14 = + 6 1 = 14 – 7 2 6 + = 14 2 7 + = 14 3 =8+6 3 7 = 14 – 4 14 = 6 + 4 + 7 = 14 5 14 – =8 5 14 – 7 = 6 8 + = 14 6 7+7= 7 6= –8 7 =7+7 8 14 = + 8 8 14 = 7 + 9 14 – 8 = 9 14 = + 7 10 8 + 6 = 10 7 = –7 11 + 8 = 14 11 14 – =7 12 14 – =6 12 – 7 = 7 13 14 – 6 = 14 8 = – 6 15 = 14 – 8 16 – 8 = 6 17 = 6 + 814Number Operations.indb 14 08-11-2018 14:30:52
Fact families of 15 Fact family: 15, 9, 6 15 Fact family: 15, 10, 5 15 10 5 961 5 = – 10 1 15 = 6 +2 – 10 = 5 2 6 = 15 –3 5 = 15 – 3 9 = 15 –4 – 5 = 10 4 = 15 – 65 15 – =5 5 + 6 = 156 = 10 + 5 6 =6+97 15 = 5 + 7 =9+68 10 = 15 – 8 –6=99 10 + = 15 9 15 – =610 = 15 – 5 10 + 9 = 1511 = 15 – 10 11 15 = +612 15 – 10 = 12 9 + = 1513 10 + 5 = 13 15 – 9 =14 15 – = 10 14 15 = +915 15 = 10 + 15 9 + 6 =16 10 = –5 16 – 9 = 617 5 + 10 = 17 6 + = 15 15 Fact Family: 2–19Number Operations.indb 15 08-11-2018 14:30:54
Fact family: 15, 8, 7 Fact families of 15, 16 15 Fact family: 16, 10, 6 16 87 10 6 1 –8=7 1 = 16 – 6 2 + 7 = 15 2 16 – =6 3 15 – =7 3 10 = 16 – 4 –7=8 4 10 + = 16 5 8= –7 5 + 10 = 16 6 7 + = 15 6 16 = 10 + 7 15 – 7 = 7 16 = + 10 8 =7+8 8 16 – = 10 9 15 = 7 + 9 6 = – 10 10 8 + = 15 10 6 + 10 = 11 15 = + 8 11 16 = 6 + 12 = 15 – 8 12 6 + = 16 13 15 – =8 13 16 – 6 = 14 8 + 7 = 14 6 = 16 – 15 7 = 15 – 15 + 6 = 16 16 15 = 8 + 16 10 = –6 17 15 – 8 = 17 – 6 = 1016Number Operations.indb 16 08-11-2018 14:30:55
Fact families of 16 Fact family: 16, 8, 8 16Fact family: 16, 9, 7 16 97 881 16 = + 7 1 16 = + 82 + 7 = 16 2 8 = 16 –3 16 = 9 + 3 –8=84 –9=7 4 8+8=5 9= – 7 5 8= –86 7= – 9 6 = 16 – 87 16 = + 9 7 =8+88 16 – =9 8 + 8 = 169 + 9 = 16 9 16 – 8 =10 16 – 9 = 10 16 = 8 +11 = 9 + 7 11 16 – =812 = 7 + 9 12 8 + = 1613 9 = 16 –14 7 + 9 =15 16 – =716 7 + = 1617 16 – 7 = 17 Fact Family: 2–19Number Operations.indb 17 08-11-2018 14:30:57
Fact family: 17, 10, 7 Fact families of 17 17 Fact family: 17, 9, 8 17 10 7 98 1 17 – 7 = 1 17 = 8 + 2 10 = –7 2 9= –8 3 = 17 – 10 3 17 – 8 = 4 7 + 10 = 4 9+8= 5 17 – 10 = 5 17 – =8 6 + 10 = 17 6 –8=9 7 = 17 – 7 7 + 9 = 17 8 17 = 7 + 8 17 = + 9 9 – 10 = 7 9 8 + = 17 10 7 + = 17 10 17 = + 8 11 7 = – 10 11 = 8 + 9 12 = 10 + 7 12 = 9 + 8 13 7 = 17 – 13 8 = 17 – 14 + 7 = 17 14 + 8 = 17 15 17 = 10 + 15 9 = 17 – 16 17 – = 10 16 17 – 9 = 17 10 + = 17 17 8 = – 918Number Operations.indb 18 08-11-2018 14:30:58
Fact families of 18 Fact family: 18, 9, 9 18 Fact family: 18, 10, 8 18 10 8 991 18 = + 10 1 + 9 = 182 8 + 10 = 2 18 – =93 = 18 – 10 3 9 = 18 –4 = 8 + 10 4 9 + = 185 – 10 = 8 5 9+9=6 18 – 8 = 6 = 18 – 97 10 + = 18 7 18 = + 98 10 = 18 – 8 18 – 9 =9 18 = + 8 9 –9=910 10 + 8 = 10 9 = –911 + 10 = 18 11 = 9 + 912 18 = 8 + 12 18 = 9 +13 8 = 18 –14 – 8 = 1015 8 = – 1016 10 = –817 18 – = 10 19 Fact Family: 2–19Number Operations.indb 19 08-11-2018 14:30:59
Fact family of 19 Fact family: 19, 10, 9 Complete Time: 19 the following 2 minutes facts. 10 9 1 = 11 + 5 2 14 = + 2 1 = 19 – 9 3 –8=7 2 – 10 = 9 4 12 + 6 = 3 = 9 + 10 5 –8=9 4 10 = 19 – 6 6 = 19 – 5 9 + = 19 7 + 10 = 13 6 19 – 10 = 8 1 = – 10 7 = 19 – 10 9 = 12 – 1 8 10 + = 19 10 = 19 – 9 9 19 = 9 + 11 17 – =6 10 – 9 = 10 12 6 + 9 = 11 + 9 = 19 13 11 + 7 = 12 9 = 19 – 14 – 8 = 8 13 19 – = 10 15 9 = 13 – 14 9 + 10 = 16 + 7 = 14 15 10 + 9 = 17 2 = – 9 16 19 = + 9 18 = 12 – 1 17 19 – 9 =20Number Operations.indb 20 08-11-2018 14:31:01
BREAKING DOWN NUMBERS Let us revise Expand the following numbers as shown. = Hundreds = Tens = Ones 1 139= 1 + 3 + 9 2 750= + + 3 700= + + 4 416= + + 5 998= + + 6 716= + + 7 668= + + 8 600= + + 9 502= + + 10 8 5 4 = 5 + 8 + 4 11 5 6 5 = + + 12 1 2 6 = + + 13 8 0 3 = + + 14 2 1 4 = + + 15 9 7 1 = + + 21Number Operations.indb 21 08-11-2018 14:31:04
Solve the following problems.1 462 2 634 +537 –2223 635 4 234 –420 +7015 121 6 688 +206 –5227 186 8 379 +311 –1639 965 10 4 9 8 –712 –443 11 6 9 7 12 7 8 7 +766 –263 22 08-11-2018 14:31:06Number Operations.indb 22
13 2 6 0 14 5 0 3 +625 +493 15 2 5 4 16 8 6 0 –225 –341 17 9 8 1 18 8 4 2 –655 –613 19 5 8 0 20 4 7 5 –276 –258 21 8 0 5 22 8 4 5 –634 –579 23 2 5 4 24 5 6 5 +772 +977Number Operations.indb 23 23 Breaking Down Numbers 08-11-2018 14:31:07
Mentally add the 2-digit numbers given below. Example: 24 + 63 = 20 + 60 + 4 + 3 = 87 1 33 + 46 = 21 40 + 29 = 2 16 + 52 = 22 52 + 25 = 3 66 + 30 = 23 24 + 24 = 4 21 + 27 = 24 68 + 11 = 5 45 + 22 = 25 33 + 42 = 6 60 + 18 = 26 67 + 31 = 7 52 + 41 = 27 50 + 18 = 8 68 + 20 = 28 13 + 58 = 9 15 + 21 = 29 31 + 36 = 10 23 + 23 = 30 46 + 11 = 11 38 + 21 = 31 23 + 50 = 12 34 + 32 = 32 73 + 21 = 13 22 + 14 = 33 20 + 61 = 14 31 + 34 = 34 27 + 10 = 15 15 + 63 = 35 31 + 46 = 16 73 + 13 = 36 34 + 32 = 17 60 + 37 = 37 20 + 33 = 18 12 + 63 = 38 64 + 34 = 19 40 + 17 = 39 15 + 14 = 20 51 + 26 = 40 36 + 63 =24Number Operations.indb 24 08-11-2018 14:31:09
Mentally add the 2-digit numbers given below.Example: 36 + 45 = 36 + 4 + 45 – 4 = 40 + 41 = 81 1 17 + 18 = 20 + 15 = 2 28 + 44 = + = 3 59 + 16 = + = 4 26 + 17 = + = 5 45 + 39 = 20 59 + 34 = 6 62 + 19 = 21 46 + 48 = 7 57 + 25 = 22 68 + 25 = 8 24 + 66 = 23 79 + 19 = 9 73 + 27 = 24 23 + 68 = 10 59 + 33 = 25 54 + 37 = 11 13 + 37 = 26 29 + 49 = 12 36 + 49 = 27 46 + 26 = 13 28 + 58 = 28 24 + 37 = 14 69 + 26 = 29 18 + 74 = 15 12 + 88 = 30 53 + 19 = 16 78 + 17 = 31 65 + 26 = 17 45 + 15 = 32 48 + 38 = 18 24 + 26 = 33 66 + 17 = 19 45 + 47 = 34 18 + 44 = Breaking Down Numbers 25Number Operations.indb 25 08-11-2018 14:31:10
Let us learn Expand the following numbers as shown. = Thousands = Hundreds = Tens = Ones 1 5174=5 +1 +7 +4 2 2802= + + + 3 7546= + + + 4 5285= + + + 5 6659= + + + 6 7663= + + + 7 8382= + + + 8 1944= + + + 9 6167= + + + 10 8 9 1 3 = + + + 11 2 4 8 8 = 8 +2 +4 +8 12 4 7 4 1 = + + + 13 8 6 7 9 = + + + 14 8 4 3 1 = + + + 15 6 1 8 8 = + + + 16 4 2 3 1 = + + + 17 7 6 9 8 = + + + 18 6 9 3 2 = + + +26Number Operations.indb 26 08-11-2018 14:31:13
Solve the following problems. 2 4721 +2122 1 1545 +31403 8644 4 8439 –5131 –61275 6051 6 2613 +2726 +53347 8384 8 5570 –2630 +19649 8325 10 8 0 2 4 –1689 –2031 11 8 7 7 4 12 3 5 1 8 –8757 +5063Number Operations.indb 27 27 Breaking Down Numbers 08-11-2018 14:31:13
13 6 2 4 8 14 3 8 5 7 +3701 –1405 15 5 6 3 9 16 9 7 4 2 –3614 –6210 17 7 7 9 8 18 4 7 4 8 –6715 –1600 19 7 8 6 0 20 6 7 0 5 +6242 –4046 21 6 3 1 3 22 9 5 4 5 –1868 –1561 23 8 8 7 2 24 7 8 4 6 +4193 –6756 28 08-11-2018 14:31:14Number Operations.indb 28
Skip Counting Let us revise Practise skip counting by 2 Complete the series. 1 83, 81, 79, ___ , 75, ___ , 71, 69, 67 2 6, ___ , 10, 12, 14, ___ , ___ , 20, 22 3 27, ___ , 31, ___ , ___ , 37, 39, 41, 43 4 28, 30, 32, 34, ___ , 38, ___ , ___ , 44Show skip counting by 2 on the number line. 1 Start at 1 and skip count forwards 7 times. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 2 Start at 15 and skip count backwards 4 times. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 29Number Operations.indb 29 08-11-2018 14:31:16
Practise skip counting by 3 Complete the series. 1 64, 61, 58, 55, ___ , 49, 46, 43, 40 2 23, 26, 29, ___ , 35, 38, ___ , ___ , 47 3 115, ___ , ___ , ___ , 103, 100, 97, 94, 91 4 79, 76, 73, ___ , ___ , ___ , 61, 58, 55 Show skip counting by 3 on the number line. 1 Start at 22 and skip count backwards 4 times. 0 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 2 Start at 4 and skip count forwards 5 times. 0 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 3 Start at 11 and skip count forwards 3 times. 0 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 2830Number Operations.indb 30 08-11-2018 14:31:17
Practise skip counting by 4 Complete the series. 1 81, 77, ___ , ___ , 65, 61, 57, ___ , 49 2 100, 96, 92, 88, ___ , 80, ___ , 72, 68 3 105, ___ , 97, 93, ___ , ___ , 81, 77, 73 4 119, 115, ___ , 107, ___ , 99, 95, ___ , 87 Show skip counting by 4 on the number line. 1 Start at 6 and skip count forwards 4 times. 0 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 2 Start at 3 and skip count forwards 6 times. 0 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 3 Start at 21 and skip count backwards 5 times. 0 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 31 Skip CountingNumber Operations.indb 31 08-11-2018 14:31:18
Practise skip counting by 5 Complete the series. 1 120, 115, 110, ___ , ___ , ___ , 90, 85, 80 2 9, 14, 19, ___ , 29, 34, ___ , ___ , 49 3 94, ___ , ___ , 79, 74, ___ , 64, 59, 54 4 103, ___ , ___ , ___ , 83, 78, 73, 68, 63 Show skip counting by 5 on the number line. 1 Start at 2 and skip count forwards 5 times. 0 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 2 Start at 26 and skip count backwards 4 times. 0 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 3 Start at 8 and skip count forwards 3 times. 0 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 2832Number Operations.indb 32 08-11-2018 14:31:19
Practise skip counting with numbers from 2 to 5 Complete the series. 1 4, ___ , 14, ___ , ___ , 29, 34, 39, 44 2 72, ___ , ___ , 63, ___ , 57, 54, 51, 48 3 29, ___ , ___ , ___ , 37, 39, 41, 43, 45 4 68, ___ , 60, ___ , 52, ___ , 44, 40, 36 5 85, 81, ___ , 73, 69, ___ , ___ , 57, 53 6 10, ___ , ___ , ___ , 30, 35, 40, 45, 50 7 14, 17, 20, 23, 26, ___ , 32, ___ , 38 Write the number by which skip counting is shown below. 1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Solution: 2 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Solution: 33 Skip CountingNumber Operations.indb 33 08-11-2018 14:31:19
Let us learn Practise skip counting by 6 Complete the series. 1 5, ___ , 17, ___ , 29, 35, 41, ___ , 53 2 69, ___ , ___ , 51, ___ , 39, 33, 27, 21 3 29, ___ , 41, 47, ___ , ___ , 65, 71, 77 4 13, 19, 25, 31, ___ , ___ , 49, ___ , 61 5 100, ___ , ___ , ___ , 76, 70, 64, 58, 52 6 74, ___ , 62, ___ , ___ , 44, 38, 32, 26 Show skip counting by 6 on the number line. 1 Start at 3 and skip count forwards 4 times. 0 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 2 Start at 25 and skip count backwards 3 times. 0 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 2834Number Operations.indb 34 08-11-2018 14:31:20
3 Start at 23 and skip count backwards 2 times. 0 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 4 Start at 1 and skip count forwards 3 times. 0 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 5 Start at 4 and skip count forwards 4 times. 0 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 6 Start at 20 and skip count backwards 2 times. 0 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 7 Start at 9 and skip count forwards 3 times. 0 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 35 Skip CountingNumber Operations.indb 35 08-11-2018 14:31:20
Repeated addition Let us revise Practise repeated addition: 2 to 5 Fill in the blanks. 1 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 = ___ 2 4 + 4 + 4 + 4 = ___ 3 4 + 4 + 4 + 4 + 4 + 4 = ___ 4 3 + 3 + 3 + 3 + 3 + 3 + 3 = ___ 5 5 + 5 + 5 + 5 = ___ 6 2 + 2 + 2 + 2 + 2 + 2 = ___ 7 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 = ___ 8 2 + 2 + 2 + 2 + 2 + 2 + 2 = ___ 9 3 + 3 = ___ 10 3 + 3 + 3 = ___ Complete the missing numbers. 1 2 + 2 + 2 = 2 × ___ 2 4 × ___ = 4 + 4 + 4 + 4 + 4 + 4 + 4 3 3 × ___ = 3 + 3 + 3 + 3 + 3 4 4 + 4 + 4 + 4 = 4 × ___36Number Operations.indb 36 08-11-2018 14:31:22
5 2 + 2 + 2 = 2 × ___ 6 3 × ___ = 3 + 3 7 5 + 5 + 5 + 5 + 5 = 5 × ___ 8 4 × ___ = 4 + 4 + 4 9 2 + 2 + 2 + 2 = 2 × ___ 10 5 × ___ = 5 + 5 + 5 + 5 + 5 + 5 + 5 11 4 + 4 + 4 + 4 + 4 + 4 = 4 × ___ 12 5 + 5 + 5 = 5 × ___Write an expression to count the total number of blocksgiven below. 1Solution: 2+2+2+2+2+2+2+2=2×8 2Solution: 37 Repeated AdditionNumber Operations.indb 37 08-11-2018 14:31:23
3 08-11-2018 14:31:23 Solution: 4 Solution: 5 Solution: 6 Solution: 7 Solution: 38Number Operations.indb 38
Let us learn Practise repeated addition: 6 to 8 Fill in the blanks. 1 7 + 7 = ___ 2 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 = ___ 3 6 + 6 + 6 + 6 + 6 = ___ 4 8 + 8 + 8 + 8 + 8 + 8 + 8 = ___ 5 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 = ___ 6 8 + 8 + 8 = ___ 7 6 + 6 + 6 + 6 = ___ 8 7 + 7 + 7 + 7 = ___ 9 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 = ___ 10 6 + 6 + 6 = ___Complete the missing numbers. 1 7 + 7 = 7 × ___ 2 6 × ___ = 6 + 6 + 6 3 7 + 7 + 7 + 7 = 7 × ___ 4 8 × ___ = 8 + 8 5 7 × ___ = 7 + 7 + 7 + 7 + 7 + 7 + 7 6 6 + 6 + 6 + 6 + 6 + 6 + 6 = 6 × ___ 39 Repeated AdditionNumber Operations.indb 39 08-11-2018 14:31:24
7 8 × ___ = 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 8 7 × ___ = 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 9 8 + 8 + 8 + 8 + 8 = 8 × ___ 10 6 × ___ = 6 + 6 + 6 + 6 + 6 11 6 = 6 × ___ 12 8 × ___ = 8 + 8 + 8 + 8Write an expression to count the total number of blocksgiven below. 1Solution: 2Solution: 40 08-11-2018 14:31:25Number Operations.indb 40
3 41 Solution: Repeated Addition 4 08-11-2018 14:31:25 Solution: 5 Solution: 6 Solution: 7 Solution:Number Operations.indb 41
Repeated subtraction Let us learn Practise repeated subtraction: 1 to 3 Fill in the blanks. 1 24 – 2 – 2 – 2 – 2 – 2 – 2 – 2 – 2 – 2 = ___ 2 15 – 1 – 1 – 1 = ___ 3 20 – 2 – 2 = ___ 4 51 – 3 – 3 – 3 – 3 – 3 = ___ 5 30 – 3 – 3 – 3 – 3 – 3 – 3 – 3 = ___ 6 22 – 2 – 2 – 2 = ___ 7 22 – 1 – 1 – 1 – 1 – 1 = ___ 8 27 – 3 – 3 – 3 – 3 – 3 – 3 – 3 = ___ 9 12 – 1 – 1 = ___ 10 7 – 1 – 1 – 1 – 1 = ___ Complete the missing numbers. 1 33 – ( 3 × ___ ) = 33 – 3 – 3 – 3 – 3 2 68 – 2 – 2 – 2 – 2 – 2 = 68 – ( 2 × ___ ) 3 40 – ( 1 × ___ ) = 40 – 1 – 1 – 1 – 1 4 55 – 1 – 1 – 1 – 1 – 1 – 1 = 55 – ( 1 × ___ )42Number Operations.indb 42 08-11-2018 14:31:27
5 45 – ( 3 × ___ ) = 45 – 3 – 3 – 3 – 3 – 3 – 3 – 3 6 39 – 3 – 3 – 3 = 39 – ( 3 × ___ ) 7 38 – ( 1 × ___ ) = 38 – 1 – 1 – 1 – 1 – 1 – 1 8 73 – 1 – 1 – 1 – 1 – 1 – 1 – 1 = 73 – ( 1 × ___ ) 9 22 – 2 – 2 – 2 – 2 – 2 – 2 = 22 – ( 2 × ___ ) 10 30 – ( 3 × ___ ) = 30 – 3 – 3 – 3 11 52 – 2 – 2 = 52 – ( 2 × ___ ) 12 18 – ( 2 × ___ ) = 18 – 2 – 2 – 2 – 2 – 2 – 2 – 2 – 2Write an expression to show the repeated subtractionshown on the number line. 1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Solution: 2 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 47 48Solution: 43 Repeated SubtractionNumber Operations.indb 43 08-11-2018 14:31:28
3 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Solution: 4 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 Solution: 5 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Solution: 6 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Solution: 7 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Solution:44Number Operations.indb 44 08-11-2018 14:31:28
Practise repeated subtraction: 4 and 5 Fill in the blanks. 1 36 – 4 – 4 – 4 = ___ 2 50 – 5 – 5 – 5 – 5 – 5 – 5 = ___ 3 56 – 4 – 4 = ___ 4 44 – 4 – 4 – 4 – 4 – 4 = ___ 5 65 – 5 – 5 – 5 = ___ 6 24 – 4 – 4 – 4 – 4 = ___ 7 45 – 5 – 5 – 5 – 5 – 5 = ___ 8 30 – 5 – 5 = ___ 9 68 – 4 – 4 – 4 – 4 – 4 – 4 = ___ 10 70 – 5 – 5 – 5 – 5 – 5 – 5 – 5 = ___ Complete the missing numbers.1 40 – 4 – 4 – 4 – 4 – 4 – 4 = 40 – ( 4 × ___ )2 55 – ( 5 × ___ ) = 55 – 5 – 5 – 5 – 53 36 – 4 – 4 – 4 – 4 – 4 = 36 – ( 4 × ___ )4 70 – 5 – 5 – 5 – 5 – 5 – 5 – 5 – 5 = 70 – ( 5 × ___ )5 48 – 4 – 4 – 4 = 48 – ( 4 × ___ )6 56 – ( 4 × ___ ) = 56 – 4 – 47 65 – 5 – 5 – 5 = 65 – ( 5 × ___ )8 80 – ( 5 × ___ ) = 80 – 5 – 5 – 5 – 5 – 5 45 Repeated SubtractionNumber Operations.indb 45 08-11-2018 14:31:29
Write an expression to show the repeated subtraction shown on the number line. 1 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 36 37 Solution: 2 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 Solution: 3 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Solution: 4 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 Solution: 5 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 36 37 Solution:46Number Operations.indb 46 08-11-2018 14:31:29
Multiplication tableS Let us revise Fill in the blanks. Practise table of 1Complete the table. 1 1×1= 1 9×1= 8 2 1×2= 2 ×1= 3 1×3= 3 7×1= 1 4 1×4= 4 ×1= 5 1×5= 5 3×1= 4 6 1×6= 6 ×1= 2 7 1×7= 7 ×1= 8 1×8= 8 10 × 1 = 6 9 1×9= 9 ×1= 10 1 × 10 = 10 5 × 1 =Solve the following. 1 1÷1= 6 7÷1= 2 5÷1= 7 8÷1= 3 2÷1= 8 9÷1= 4 10 ÷ 1 = 9 4÷1= 5 6÷1= 10 3 ÷ 1 = 47Number Operations.indb 47 08-11-2018 14:31:31
Practise table of 2 Fill in the blanks. Complete the table. 1 ×2= 2 2 7×2= 1 2×1= 3 9×2= 2 2×2= 4 2×2= 3 2×3= 5 10 × 2 = 4 2×4= 6 × 2 = 16 5 2×5= 7 ×2= 6 6 2×6= 8 6×2= 7 2×7= 9 ×2= 8 8 2×8= 10 5 × 2 = 9 2×9= 10 2 × 10 = 6 16 ÷ 2 = 7 10 ÷ 2 = Solve the following. 8 18 ÷ 2 = 9 14 ÷ 2 = 1 4÷2= 10 2 ÷ 2 = 2 12 ÷ 2 = 3 8÷2= 08-11-2018 14:31:33 4 20 ÷ 2 = 5 6÷2= 48Number Operations.indb 48
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