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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 366 · 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. 1.5 + ? = 10
  2. 2.7 + ? = 10
  3. 3.82 + ? = 100
  4. 4.17 + ? = 100
  5. 5.4 + ? = 10
  6. 6.19 + ? = 100
  7. 7.2 + ? = 10
  8. 8.31 + ? = 100
  9. 9.73 + ? = 100
  10. 10.9 + ? = 10
  11. 11.1 + ? = 10
  12. 12.62 + ? = 100
  13. 13.29 + ? = 100
  14. 14.80 + ? = 100
  15. 15.71 + ? = 100
  16. 16.13 + ? = 100
  17. 17.40 + ? = 100
  18. 18.15 + ? = 100
  19. 19.78 + ? = 100
  20. 20.66 + ? = 100
  21. 21.47 + ? = 100
  22. 22.84 + ? = 100
  23. 23.77 + ? = 100
  24. 24.59 + ? = 100
  25. 25.3 + ? = 10
  26. 26.20 + ? = 100
  27. 27.25 + ? = 100
  28. 28.43 + ? = 100
  29. 29.22 + ? = 100
  30. 30.42 + ? = 100
  31. 31.54 + ? = 100
  32. 32.69 + ? = 100
  33. 33.65 + ? = 100
  34. 34.81 + ? = 100
  35. 35.79 + ? = 100
  36. 36.8 + ? = 10
  37. 37.28 + ? = 100
  38. 38.63 + ? = 100
  39. 39.52 + ? = 100
  40. 40.6 + ? = 10

Answer key

  1. 5
  2. 3
  3. 18
  4. 83
  5. 6
  6. 81
  7. 8
  8. 69
  9. 27
  10. 1
  11. 9
  12. 38
  13. 71
  14. 20
  15. 29
  16. 87
  17. 60
  18. 85
  19. 22
  20. 34
  21. 53
  22. 16
  23. 23
  24. 41
  25. 7
  26. 80
  27. 75
  28. 57
  29. 78
  30. 58
  31. 46
  32. 31
  33. 35
  34. 19
  35. 21
  36. 2
  37. 72
  38. 37
  39. 48
  40. 4

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