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3. 10 20 30 40 50 60 70 80 90 100 Number Bonds for 100 Knowing your number bonds for 100 will help you with addition and subtraction problems. They are particularly useful for problems in involving money and measurement. £1 = 100 p and 1 m = 100 cm

4. Method 1 Make 25 up to 100 by adding on 10’s first. Method 1 25 + 70  95 + 5  100 add 75 25  95  100 7 5 Number Bonds for 100

5. Make 36 up to 100 by adding on 10’s first. + 60  96 + 4  100 Method 1 36 add 64 36  96  100 6 4 Number Bonds for 100

6. Make 47 up to 100 by adding on 10’s first. 47 + 50  97 + 3  100 Method 1 add 53 50  97  100 5 3 Number Bonds for 100

7. 29 + ? =10035 + ? =10048 + ? =100 This method is very simple once you get the hang of it because it just involves making: 1.The first digit (10’s) up to 9. 2.The second digit (units) up to 10. 7171 6565 18 + ? =10054 + ? =10040 + ? =100 5252828246466060 If the number ends in a 0 then simply make the first digit up to 10 and add the 0. Number Bonds for 100

8. 57 28 43 72 89 60 76 65 35 11 24 40 Pair the numbers to make 100

9. Number Bonds for 100 80 7 20 93 69 46 17 19 81 31 83 54 Pair the numbers to make 100

10. Number Bonds for 100 11 55 89 45 63 16 47 77 23 37 53 84 Pair the numbers to make 100

11. Number Bonds for 100 1. 48 + ? = 100 Use this method to find the missing number in each case. 2. 55 + ? = 100 3. 33 + ? = 100 4. 22 + ? = 100 5. 39 + ? = 100 6. 51 + ? = 100 7. 16 + ? = 100 8. 30 + ? = 100 9. 88 + ? = 100 10. 91 + ? =100 52 45 67 78 61 49 84 70 12 9

12. 1. 100 - 15 = ? Try this method of “ADDING ON” with these subtraction sums. 2. 100 - 22 = ? 3. 100 - 51 = ? 4. 100 - 34 = ? 5. 100 - 42 = ? 6. 100 - 13 = ? 7. 100 - 33 = ? 8. 100 - 64 = ? 9. 100 - 89 = ? 10.100 - 71 = ? 85 78 49 66 58 87 67 36 11 29 Number Bonds for 100

13. 1. ? + 47 = 100 2. 100 - 26 = ? 3. 38 + ? = 100 4. 100 - ? = 88 5. ? + 14 = 100 6. 100 - 35 = ? 7. 43 + ? = 100 8. 100 - 78 = ? 9. 19 + ? = 100 10. 100 - 14 = ? 53 74 62 12 86 65 57 22 81 86 Number Bonds for 100 Try this method of “ADDING ON” with these mixed questions.

14. Worksheet (Print) 1. 48 + = 100 2. 55 + = 100 3. 33 + = 100 4. 22 + = 100 5. 39 + = 100 6. 51 + = 100 7. 16 + = 100 8. 30 + = 100 9. 88 + = 100 10. 91 + = 100 1. 100 - 15 = 2. 100 - 22 = 3. 100 - 51 = 4. 100 - 34 = 5. 100 - 42 = 6. 100 - 13 = 7. 100 - 33 = 8. 100 - 64 = 9. 100 - 89 = 10.100 - 71 = 1. + 47 = 100 2. 100 – 26 = 3. 38 + = 100 4. 100 - = 88 5. + 14 = 100 6. 100 - 35 = 7. 43 + = 100 8. 100 - 78 = 9. 19 + = 100 10.100 - 14 = Worksheet 1. 48 + = 100 2. 55 + = 100 3. 33 + = 100 4. 22 + = 100 5. 39 + = 100 6. 51 + = 100 7. 16 + = 100 8. 30 + = 100 9. 88 + = 100 10. 91 + = 100 1. 100 - 15 = 2. 100 - 22 = 3. 100 - 51 = 4. 100 - 34 = 5. 100 - 42 = 6. 100 - 13 = 7. 100 - 33 = 8. 100 - 64 = 9. 100 - 89 = 10.100 - 71 = 1. + 47 = 100 2. 100 – 26 = 3. 38 + = 100 4. 100 - = 88 5. + 14 = 100 6. 100 - 35 = 7. 43 + = 100 8. 100 - 78 = 9. 19 + = 100 10.100 - 14 =

15. ££££££££££££££££ ££££££££££££££££ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ Cost 37p How much change did Simon get after buying the sweets? 63p Money Use this method of “ADDING ON” to find the change from £1 (100 p).

16. ££££££££££££££££ ££££££££££££££££ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ Cost 14p How much change did Jenny get after buying the sweets? 86p Use this method of “ADDING ON” to find the change from £1 (100 p).

17. ££££££££££££££££ ££££££££££££££££ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ Cost 47p How much change did Simon get after buying the chocolate? 53p Use this method of “ADDING ON” to find the change from £1 (100 p).

18. ££££££££££££££££ ££££££££££££££££ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ Cost 55p How much change did Jenny get after buying the chocolate? 45p Use this method of “ADDING ON” to find the change from £1 (100 p).

19. ££££££££££££££££ ££££££££££££££££ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ Cost 75p How much change did Simon get after buying the Easter egg? 25p Use this method of “ADDING ON” to find the change from £1 (100 p).

20. ££££££££££££££££ ££££££££££££££££ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ Cost 82p How much change did Jenny get after buying the Easter egg? 18p Use this method of “ADDING ON” to find the change from £1 (100 p).

21. ££££££££££££££££ ££££££££££££££££ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ Cost 38p How much change did Simon get after buying the pencil sharpener? 62p Use this method of “ADDING ON” to find the change from £1 (100 p).

22. ££££££££££££££££ ££££££££££££££££ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ £ Cost 12p How much change did Jenny get after buying the pencil? 88p Use this method of “ADDING ON” to find the change from £1 (100 p).

23. Use this method of “ADDING ON” to solve the following problems. Robert sawed 55 cm of a piece of wood 1m long. How much was left over? 45 cm Metre

24. Use this method of “ADDING ON” to solve the following problems. How much of the plastic strip is coloured red? 69 cm 1 m 31 cm

25. Use this method of “ADDING ON” to solve the following problems. How much of the plastic strip is coloured blue? 32 cm 1 m 68 cm

26. Use this method of “ADDING ON” to solve the following problems. How much of the plastic strip is coloured green? 11 cm 1 m 89 cm

27. Use this method of “ADDING ON” to solve the following problems. Robert sawed 17 cm of a piece of wood 1m long. How much was left over? 83 cm

28. Method 2 Make 41 up to 100 by adding on units first. Method 2 + 9  50 + 50  100 41 add 59 41  50  100 9 50 Number Bonds for 100

29. Make 17 up to 100 by adding on units first. Method 2 17 + 3  20 + 80  100 add 83 17  20  100 3 80 Number Bonds for 100

30. Make 72 up to 100 by adding on units first. Method 2 add 28 72  80  100 8 20 72 + 8  80 + 20  100 Number Bonds for 100

31. Interactive 100 ? 18 80 91 72 87 56 78 82 92 Click on the number that makes the middle number up to100 Click on remaining numbers to remove or go to next slide.

32. ? 53 46 48 45 56 49 57 47 55 Click on the number that makes the middle number up to 100 Click on remaining numbers to remove or go to next slide.

33. ? 39 60 68 67 74 81 75 61 71 Click on the number that makes the middle number up to 100 Click on remaining numbers to remove or go to next slide.

34. ? 47 61 54 43 63 45 55 52 Click on the number that makes the middle number up to 100 Click on remaining numbers to remove or go to next slide. 53

35. ? 44 46 78 54 76 64 75 66 Click on the number that makes the middle number up to 100 Click on remaining numbers to remove or go to next slide. 56

36. ? 81 79 61 51 18 21 29 39 Click on the number that makes the middle number up to 100 Click on remaining numbers to remove or go to next slide. 19

37. ? 14 75 95 96 90 85 76 84 Click on the number that makes the middle number up to 100 Click on remaining numbers to remove or go to next slide. 86

38. ? 55 57 56 46 47 48 54 45 55 Click on the number that makes the middle number up to100 Click on remaining numbers to remove or go to next slide.

39. ? 86 25 68 26 44 43 34 14 24 Click on the number that makes the middle number up to 100 Click on remaining numbers to remove or go to next slide.

40. ? 35 53 78 79 55 69 85 75 Click on the number that makes the middle number up to 100 Click on remaining numbers to remove or go to next slide. 65

41. ? 27 72 80 78 77 87 83 73 93 Click on the number that makes the middle number up to100 LAST ONE!