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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 433 · 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. 1.75 + ? = 100
  2. 2.78 + ? = 100
  3. 3.7 + ? = 10
  4. 4.17 + ? = 100
  5. 5.28 + ? = 100
  6. 6.4 + ? = 10
  7. 7.6 + ? = 10
  8. 8.35 + ? = 100
  9. 9.1 + ? = 10
  10. 10.11 + ? = 100
  11. 11.9 + ? = 10
  12. 12.5 + ? = 10
  13. 13.8 + ? = 10
  14. 14.36 + ? = 100
  15. 15.84 + ? = 100
  16. 16.89 + ? = 100
  17. 17.74 + ? = 100
  18. 18.87 + ? = 100
  19. 19.2 + ? = 10
  20. 20.52 + ? = 100
  21. 21.81 + ? = 100
  22. 22.32 + ? = 100
  23. 23.82 + ? = 100
  24. 24.25 + ? = 100
  25. 25.13 + ? = 100
  26. 26.63 + ? = 100
  27. 27.42 + ? = 100
  28. 28.79 + ? = 100
  29. 29.48 + ? = 100
  30. 30.3 + ? = 10
  31. 31.62 + ? = 100
  32. 32.76 + ? = 100
  33. 33.69 + ? = 100
  34. 34.31 + ? = 100
  35. 35.22 + ? = 100
  36. 36.71 + ? = 100
  37. 37.72 + ? = 100
  38. 38.88 + ? = 100
  39. 39.38 + ? = 100
  40. 40.23 + ? = 100

Answer key

  1. 25
  2. 22
  3. 3
  4. 83
  5. 72
  6. 6
  7. 4
  8. 65
  9. 9
  10. 89
  11. 1
  12. 5
  13. 2
  14. 64
  15. 16
  16. 11
  17. 26
  18. 13
  19. 8
  20. 48
  21. 19
  22. 68
  23. 18
  24. 75
  25. 87
  26. 37
  27. 58
  28. 21
  29. 52
  30. 7
  31. 38
  32. 24
  33. 31
  34. 69
  35. 78
  36. 29
  37. 28
  38. 12
  39. 62
  40. 77

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