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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 162 · 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. 1.4 + ? = 10
  2. 2.1 + ? = 10
  3. 3.19 + ? = 100
  4. 4.47 + ? = 100
  5. 5.8 + ? = 10
  6. 6.34 + ? = 100
  7. 7.9 + ? = 10
  8. 8.48 + ? = 100
  9. 9.86 + ? = 100
  10. 10.14 + ? = 100
  11. 11.6 + ? = 10
  12. 12.66 + ? = 100
  13. 13.27 + ? = 100
  14. 14.68 + ? = 100
  15. 15.16 + ? = 100
  16. 16.5 + ? = 10
  17. 17.7 + ? = 10
  18. 18.82 + ? = 100
  19. 19.42 + ? = 100
  20. 20.2 + ? = 10
  21. 21.45 + ? = 100
  22. 22.43 + ? = 100
  23. 23.89 + ? = 100
  24. 24.28 + ? = 100
  25. 25.3 + ? = 10
  26. 26.71 + ? = 100
  27. 27.33 + ? = 100
  28. 28.32 + ? = 100
  29. 29.22 + ? = 100
  30. 30.20 + ? = 100
  31. 31.29 + ? = 100
  32. 32.40 + ? = 100
  33. 33.17 + ? = 100
  34. 34.76 + ? = 100
  35. 35.70 + ? = 100
  36. 36.78 + ? = 100
  37. 37.83 + ? = 100
  38. 38.73 + ? = 100
  39. 39.30 + ? = 100
  40. 40.24 + ? = 100

Answer key

  1. 6
  2. 9
  3. 81
  4. 53
  5. 2
  6. 66
  7. 1
  8. 52
  9. 14
  10. 86
  11. 4
  12. 34
  13. 73
  14. 32
  15. 84
  16. 5
  17. 3
  18. 18
  19. 58
  20. 8
  21. 55
  22. 57
  23. 11
  24. 72
  25. 7
  26. 29
  27. 67
  28. 68
  29. 78
  30. 80
  31. 71
  32. 60
  33. 83
  34. 24
  35. 30
  36. 22
  37. 17
  38. 27
  39. 70
  40. 76

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