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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 862 · 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. 1.6 + ? = 10
  2. 2.61 + ? = 100
  3. 3.7 + ? = 10
  4. 4.53 + ? = 100
  5. 5.36 + ? = 100
  6. 6.62 + ? = 100
  7. 7.12 + ? = 100
  8. 8.9 + ? = 10
  9. 9.8 + ? = 10
  10. 10.21 + ? = 100
  11. 11.5 + ? = 10
  12. 12.3 + ? = 10
  13. 13.1 + ? = 10
  14. 14.81 + ? = 100
  15. 15.18 + ? = 100
  16. 16.50 + ? = 100
  17. 17.2 + ? = 10
  18. 18.22 + ? = 100
  19. 19.89 + ? = 100
  20. 20.28 + ? = 100
  21. 21.17 + ? = 100
  22. 22.25 + ? = 100
  23. 23.58 + ? = 100
  24. 24.38 + ? = 100
  25. 25.84 + ? = 100
  26. 26.72 + ? = 100
  27. 27.16 + ? = 100
  28. 28.31 + ? = 100
  29. 29.39 + ? = 100
  30. 30.15 + ? = 100
  31. 31.14 + ? = 100
  32. 32.85 + ? = 100
  33. 33.43 + ? = 100
  34. 34.60 + ? = 100
  35. 35.78 + ? = 100
  36. 36.83 + ? = 100
  37. 37.40 + ? = 100
  38. 38.4 + ? = 10
  39. 39.37 + ? = 100
  40. 40.74 + ? = 100

Answer key

  1. 4
  2. 39
  3. 3
  4. 47
  5. 64
  6. 38
  7. 88
  8. 1
  9. 2
  10. 79
  11. 5
  12. 7
  13. 9
  14. 19
  15. 82
  16. 50
  17. 8
  18. 78
  19. 11
  20. 72
  21. 83
  22. 75
  23. 42
  24. 62
  25. 16
  26. 28
  27. 84
  28. 69
  29. 61
  30. 85
  31. 86
  32. 15
  33. 57
  34. 40
  35. 22
  36. 17
  37. 60
  38. 6
  39. 63
  40. 26

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