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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 929 · 40 questions
TalentJR

How to do it in your head (Make 10): Bonds to 10: 1 + 9, 2 + 8, 3 + 7, 4 + 6, 5 + 5. Bonds to 100: the ones make 10, and the tens make 9 (because the ones already gave one ten). If the number ends in 0, the tens make 10: 40 + 60 = 100.

NameDateTime takenScore ___ / 40
  1. 1.57 + ? = 100
  2. 2.9 + ? = 10
  3. 3.6 + ? = 10
  4. 4.1 + ? = 10
  5. 5.86 + ? = 100
  6. 6.58 + ? = 100
  7. 7.71 + ? = 100
  8. 8.2 + ? = 10
  9. 9.31 + ? = 100
  10. 10.20 + ? = 100
  11. 11.3 + ? = 10
  12. 12.5 + ? = 10
  13. 13.4 + ? = 10
  14. 14.24 + ? = 100
  15. 15.39 + ? = 100
  16. 16.69 + ? = 100
  17. 17.8 + ? = 10
  18. 18.89 + ? = 100
  19. 19.66 + ? = 100
  20. 20.26 + ? = 100
  21. 21.34 + ? = 100
  22. 22.51 + ? = 100
  23. 23.42 + ? = 100
  24. 24.29 + ? = 100
  25. 25.16 + ? = 100
  26. 26.19 + ? = 100
  27. 27.61 + ? = 100
  28. 28.12 + ? = 100
  29. 29.50 + ? = 100
  30. 30.7 + ? = 10
  31. 31.43 + ? = 100
  32. 32.72 + ? = 100
  33. 33.60 + ? = 100
  34. 34.48 + ? = 100
  35. 35.11 + ? = 100
  36. 36.32 + ? = 100
  37. 37.28 + ? = 100
  38. 38.46 + ? = 100
  39. 39.54 + ? = 100
  40. 40.87 + ? = 100

Answer key

  1. 43
  2. 1
  3. 4
  4. 9
  5. 14
  6. 42
  7. 29
  8. 8
  9. 69
  10. 80
  11. 7
  12. 5
  13. 6
  14. 76
  15. 61
  16. 31
  17. 2
  18. 11
  19. 34
  20. 74
  21. 66
  22. 49
  23. 58
  24. 71
  25. 84
  26. 81
  27. 39
  28. 88
  29. 50
  30. 3
  31. 57
  32. 28
  33. 40
  34. 52
  35. 89
  36. 68
  37. 72
  38. 54
  39. 46
  40. 13

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