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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 263 · 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. 1.9 + ? = 10
  2. 2.13 + ? = 100
  3. 3.5 + ? = 10
  4. 4.2 + ? = 10
  5. 5.78 + ? = 100
  6. 6.1 + ? = 10
  7. 7.6 + ? = 10
  8. 8.19 + ? = 100
  9. 9.36 + ? = 100
  10. 10.29 + ? = 100
  11. 11.46 + ? = 100
  12. 12.48 + ? = 100
  13. 13.43 + ? = 100
  14. 14.17 + ? = 100
  15. 15.62 + ? = 100
  16. 16.8 + ? = 10
  17. 17.27 + ? = 100
  18. 18.4 + ? = 10
  19. 19.7 + ? = 10
  20. 20.25 + ? = 100
  21. 21.30 + ? = 100
  22. 22.71 + ? = 100
  23. 23.60 + ? = 100
  24. 24.86 + ? = 100
  25. 25.53 + ? = 100
  26. 26.34 + ? = 100
  27. 27.59 + ? = 100
  28. 28.76 + ? = 100
  29. 29.16 + ? = 100
  30. 30.20 + ? = 100
  31. 31.83 + ? = 100
  32. 32.23 + ? = 100
  33. 33.42 + ? = 100
  34. 34.72 + ? = 100
  35. 35.88 + ? = 100
  36. 36.51 + ? = 100
  37. 37.87 + ? = 100
  38. 38.21 + ? = 100
  39. 39.49 + ? = 100
  40. 40.65 + ? = 100

Answer key

  1. 1
  2. 87
  3. 5
  4. 8
  5. 22
  6. 9
  7. 4
  8. 81
  9. 64
  10. 71
  11. 54
  12. 52
  13. 57
  14. 83
  15. 38
  16. 2
  17. 73
  18. 6
  19. 3
  20. 75
  21. 70
  22. 29
  23. 40
  24. 14
  25. 47
  26. 66
  27. 41
  28. 24
  29. 84
  30. 80
  31. 17
  32. 77
  33. 58
  34. 28
  35. 12
  36. 49
  37. 13
  38. 79
  39. 51
  40. 35

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