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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 154 · 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. 1.7 + ? = 10
  2. 2.63 + ? = 100
  3. 3.8 + ? = 10
  4. 4.16 + ? = 100
  5. 5.68 + ? = 100
  6. 6.9 + ? = 10
  7. 7.45 + ? = 100
  8. 8.5 + ? = 10
  9. 9.40 + ? = 100
  10. 10.17 + ? = 100
  11. 11.1 + ? = 10
  12. 12.53 + ? = 100
  13. 13.2 + ? = 10
  14. 14.62 + ? = 100
  15. 15.37 + ? = 100
  16. 16.83 + ? = 100
  17. 17.42 + ? = 100
  18. 18.4 + ? = 10
  19. 19.41 + ? = 100
  20. 20.58 + ? = 100
  21. 21.20 + ? = 100
  22. 22.39 + ? = 100
  23. 23.79 + ? = 100
  24. 24.6 + ? = 10
  25. 25.81 + ? = 100
  26. 26.60 + ? = 100
  27. 27.47 + ? = 100
  28. 28.32 + ? = 100
  29. 29.33 + ? = 100
  30. 30.14 + ? = 100
  31. 31.25 + ? = 100
  32. 32.27 + ? = 100
  33. 33.24 + ? = 100
  34. 34.26 + ? = 100
  35. 35.66 + ? = 100
  36. 36.15 + ? = 100
  37. 37.29 + ? = 100
  38. 38.49 + ? = 100
  39. 39.18 + ? = 100
  40. 40.73 + ? = 100

Answer key

  1. 3
  2. 37
  3. 2
  4. 84
  5. 32
  6. 1
  7. 55
  8. 5
  9. 60
  10. 83
  11. 9
  12. 47
  13. 8
  14. 38
  15. 63
  16. 17
  17. 58
  18. 6
  19. 59
  20. 42
  21. 80
  22. 61
  23. 21
  24. 4
  25. 19
  26. 40
  27. 53
  28. 68
  29. 67
  30. 86
  31. 75
  32. 73
  33. 76
  34. 74
  35. 34
  36. 85
  37. 71
  38. 51
  39. 82
  40. 27

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