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Addition & Subtraction

YEAR 2. Addition & Subtraction. Bonds to 100 Add and subtract 1s Ten more, ten less. Block 2 – Week 5. Lesson 1. Step: Bonds to 100. Fluency. Match the ten frames to the sentences. 40 + 60 = 100. 60 + 40 = 100. One hundred equals seventy plus thirty. Fluency.

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Addition & Subtraction

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  1. YEAR 2 Addition & Subtraction Bonds to 100 Add and subtract 1s Ten more, ten less Block 2 – Week 5

  2. Lesson 1 Step: Bonds to 100

  3. Fluency Match the ten frames to the sentences. 40 + 60 = 100 60 + 40 = 100 One hundred equals seventy plus thirty.

  4. Fluency Match the ten frames to the sentences. 20 + 80 = 100 One hundred equals ten plus ninety. Thirty plus seventy equals one hundred.

  5. Fluency Complete the sentences based on the ten frames. _____ + 50 = 100 30 + _____ = 100 20 + _____ = 100 50 70 80

  6. Fluency Complete the sentences. 70 If I know 3 + 4 = 7 then I know 30 + 40 = _______ 80 If I know 6 + 2 = 8 then I know 60 + 20 = _______ 90 If I know 4 + 5 = 9 then I know 40 + 50 = _______

  7. Fluency Complete the sentences. 30 50 If I know 2 + 3 = 5 then I know 20 + _____ = _____ 30 90 If I know 6 + 3 = 9 then I know 60 + _____ = _____ 60 100 If I know 4 + 6 = 10 then I know 40 + _____ = _____

  8. Fluency Complete the sentences. 50 30 80 If I know 5 + 3 = 8 then I know _____ + _____ = _____ 20 40 60 If I know 2 + 4 = 6 then I know _____ + _____ = _____ 50 20 70 If I know 5 + 2 = 7 then I know _____ + _____ = _____

  9. Reasoning If I add the first 3 multiples of 10 together, my answer will be greater than 50. Do you agree with Dom? Yes. 10 + 20 + 30 = 60. 60 is greater than 50.

  10. Problem solving Complete: = 10 = 20 = 30 + = _____ 50 + = _____ 40 + = _____ 30

  11. Lesson 2 Step: Add and subtract 1s

  12. Fluency Use the picture to help you complete the sentences. There were 9 sheep. One sheep joined them. Now there are ______ sheep. There were 8 pigs. One pig wandered off. Now there are ______ pigs. 10 7

  13. Fluency Complete the number tracks. 9 10 11 12 13 14 15 16 17 18 17 18 19 20 21 22 23 24 25 26 23 24 25 26 27 28 29 30 31 32

  14. Fluency Complete the number tracks. 28 29 30 31 32 33 34 35 36 37 35 36 37 38 39 40 41 42 43 44 41 42 43 44 45 46 47 48 49 50

  15. Fluency Complete the number tracks. 56 57 58 59 60 61 62 63 64 65 74 75 76 77 78 79 80 81 82 83 88 89 90 91 92 93 94 95 96 97

  16. Fluency Continue the patterns. 8 6 17 = 23 – ______ 17 = 22 – ______ 17 = 21 – ______ 17 = 20 – ______ 17 = 19 – ______ 15 = 7 + ______ 15 = 8 + ______ 15 = ______ + ______ 15 = ______ + ______ 15 = ______ + ______ 7 5 4 9 6 10 5 3 11 4 2 Can you continue the patterns? What do you notice?

  17. Fluency Continue the patterns. 7 9 21 = 28 – ______ 21 = 27 – ______ 21 = 26 – ______ 21 = 25 – ______ 21 = 24 – ______ 26 = 17 + ______ 26 = 18 + ______ 26 = ______ + ______ 26 = ______ + ______ 26 = ______ + ______ 6 8 5 19 7 4 20 6 3 21 5 Can you continue the patterns? What do you notice?

  18. Reasoning Reasoning Spot the mistakes in each of the number tracks. Explain how you would correct them. 32 should be 23 on the first number track. 40 is missing from the second number track.

  19. Problem solving Complete the calculations below. _____ + _____ + _____ = 10 _____ + _____ + _____ = 10 _____ – _____ – _____ = 10 _____ – _____ – _____ = 10

  20. Lesson 3 Step: Add and subtract 1s (Practical)

  21. Fluency Match the number sentence to the correct answer. 3 + 1 + 2 5 7 1 + 1 + 3 2 + 3 + 2 6

  22. Fluency Match the number sentence to the correct answer. 9 – 3 – 2 5 4 10 – 3 – 1 8 – 1 – 2 6

  23. Fluency Calculate the following: 12 8 + 3 + 1 = _______ 10 7 + 1 + 2 = _______ 11 6 + 3 + 2 = _______ 13 9 + 2 + 2 = _______

  24. Fluency Calculate the following: 8 13 – 3 – 2 = _______ 10 14 – 1 – 3 = _______ 9 11 – 1 – 1 = _______ 7 12 – 2 – 3 = _______

  25. Reasoning Reasoning All calculations below have an answer less than 10. 4 + 3 + 2 14 – 2 – 1 5 + 2 + 1 12 – 1 – 2 True or false? Explain how you know. False. 14 – 2 – 1 = 11. 11 is greater than 10.

  26. Problem solving The total is more than 8. 9 + 3 – What could the missing number be?List all possibilities. 0, 1, 2 and 3.

  27. Lesson 4 Step: Ten more and ten less

  28. Fluency Complete the number tracks. 4 14 24 34 44 54 64 74 84 94 7 17 27 37 47 57 67 77 87 97 9 19 29 39 49 59 69 79 89 99

  29. Fluency Complete the number tracks. 96 86 76 66 56 46 36 26 16 6 91 81 71 61 51 41 31 21 11 1 90 80 70 60 50 40 30 20 10 0

  30. Fluency Complete the table. 56 49 59 69 64

  31. Fluency Complete the table. 13 37 58

  32. Fluency Complete the calculations. + 10 43 53 – 10 56 46

  33. Reasoning If we add ten more to a number, the digit in the ones column will sometimes change. Do you agree with Kat? No. The digit in the ones column remains the same.Only the digit in the tens column will change.

  34. Problem solving Complete the sentences. Ten more than 37 will give the same answer asten less than _________. 57 Ten less than _________ will give the same answer asten more than 76. 96 Can you create your own number problems?

  35. Lesson 5 Step: Consolidation

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