Maths_Class_1_week_28_2019_20-a22Z8ptgUZTBv

1 2 3 Topic: Addition and Subtraction Section - A A1 a. Complete the additions and subtractions for each of these. (i) 3 +1 = −1= 3 4 1 3 1 +3= −3 = 1 (ii) 6+ =7 7− 1 = 7 +6 = 7 7− = 1 16 (iii) +5 = 8 8− = 3 8 +3 = 8 8− = 5 53 Grade 1 Mathematics Week : 28 Page 109

b. Use addition to learn subtraction facts. 8+3 = 11− 3 = 4+4 = 8 −4 = 9+3 = 12− 9 = 6+5 = 11− 5 = 8+4 = 12− 8 = A2 Complete the number sentences. 7 + = 11 − 4= 7 + 4 = 11 11 − = 4 5 + = 10 10 − 5 = + 5 = 10 10 − = 5 Grade 1 Mathematics Week : 28 Page 110

A3 Try this number tree. Start from the first row. Add two numbers and write the sum in the box below. The first row has been solved for you. The last number is given so that you can check the answers. 2103 313 8 Now, try this and verify your answer with your friend. 513 plus less add subtract together + total remaining take left away sum Grade 1 Mathematics Week : 28 Page 111

A4 The boys have lost their way home! Match and draw lines to help them reach their homes. Look carefully at their noses! I have drawn one for you. 10 4 28 15 33+57 27 15 6 + 4 17+13 30 6 10 12 13 90 10 28 33 27 6 17 −4 −1 5 +57 −1 5 +4 +13 A5 a. Add or Subtract! _______ (i) There are 23 balloons. _______ _______ 12 burst How many balloons are left? (ii) In class IA, ______ There are 16 girls ______ There are 18 boys ______ Total students in IA Grade 1 Mathematics Week : 28 Page 112

b. Circle the sums that match the problem. Then add or subtract. (i) There are 27 students in the school bus. 11 more students join them. What is the total number of children in the bus now? 27 27 +11 −11 ______ ______ There are ______ children in the bus. (ii) There are 14 boats in the sea. 12 boats come back to the shore. How many boats are still in the sea? 14 14 +12 −12 ______ ______ There are ______ boats still in the sea. (iii) There are 18 mangoes in a basket. 13 mangoes are eaten. How many mangoes are in the basket now? 18 18 +13 −13 ______ ______ There are ______ mangoes in the basket. Grade 1 Mathematics Week : 28 Page 113

Section - B B1 Hey Onyx, arrange these numbers vertically and then decide whether to add or subtract. Okay. Here I go.... a. 15 add 25 b. Twenty-two add four c. 29 minus 15 TO TO TO () () () d. Add 16 and 13 e. Take away 7 from 29 f. 28 plus 20 TO TO TO () () () Grade 1 Mathematics Week : 28 Page 114

B2 Read and solve! a. Shweta had 36 stickers. She used 14 stickers. How many stickers are left with her? Total number of stickers Shweta had _______ Stickers used up _______ Number of stickers left with her _______ b. Shantanu had a collection of 18 shells. Adideb had a collection of 17 shells. How many shells did both of them collect in total? Number of shells Shantanu had _______ Number of shells Adideb had _______ Total number of shells both had _______ c. Out of 38 red and blue boats, 15 are red. How many are not red? Total number of boats _______ Number of red boats _______ Number of boats that are not red _______ Grade 1 Mathematics Week : 28 Page 115

B3 “Picnic to the Beach” Today our school closed for the summer vacations so we all decided to go to the beach in the evening. We were twenty children and eleven mothers. We played in water, built sand castles, played with ball and ran along the beach. When we were building sand castles, eight of my friends chose to collect sea shells. Five mothers were sitting on the beach when the rest of them went for a walk. At sunset, we all returned home happy. P S A a. How many people went for the picnic? (i) 20 (ii) 31 (iii) 11 b. How many children were building sand castles? c. How many mothers went for a walk? Grade 1 Mathematics Week : 28 Page 116

Section - C C1 Balance the scales. Balance the scales by filling in the correct numbers as shown. 23 5 a. 8 4 b. 10 5 c. 2 9 d. 6 7 Grade 1 Mathematics Week : 28 Page 117

e. 12 8 f. 9 2 g. 5 11 h. 5 13 i. 12 3 Grade 1 Mathematics Week : 28 Page 118

C2 5 4+ 1 6− 1 3+ 2 5− 0 a. 5+ 0 7− 2 9 4+ b. 10 − 7 1+ −1 2+ 9 − +0 −3 +1 7− 7+ −0 Do it yourself! D1 The number on top of the blocks is the total of the two numbers below. Write the missing numbers. a. b. 6 3 54 c. d. 12 8 62 Grade 1 Mathematics Week : 28 Page 119

D2 The number on the body of the butterfly is the answer to the number sentence on the wings. 0+1 1 1+0 Write the number sentences on the wings of the butterfly which will give the same answer as the one on the body of the butterfly. 5 + ___ ___ + 3 7 + ___ 12 − ___ ___ + 8 5 10 10 − ___ 8 − ___ 11 − ___ 6 + ___ 7 + ___ 9 10 − ___ 9 − ___ Grade 1 Mathematics Week : 28 Page 120

D3 Solve these sums. Write the letter that matches the answer in the space given below each sum. What occasion do we celebrate on Pandit Jawaharlal Nehru’s birthday? 20 62 26 6 17 39 16 15 + 22 2 20 +4 + 5 30 + 10 + 25 ____ ____ ____ ____ ____ ____ ____ ____ 22 35 25 35 + 11 13 + 25 20 ____ ____ ____ ____ ‘ Search for the letter matching the answer. ACDEH I LNRSY 50 42 22 26 60 6 10 40 9 33 15 Grade 1 Mathematics Week : 28 Page 121

D4 Mark ü in the boxes in which the answer is 35. Mark X in the boxes if the answer is not equal to 35. (Do the working in your notebook) Example: 12 + 23 55 12 48 13 ü X ü 67+ 1 40 5 a. 66 21 b. 99 64 27+ 8 19 + 16 D5 Draw lines to match the addition and subtraction sentences with their answer. 20 6 7+5 6 + 12 18 8 4 + 18 12 18 22 14 10 Grade 1 Mathematics Week : 28 Page 122