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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 197 · 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. 1.89 + ? = 100
  2. 2.29 + ? = 100
  3. 3.4 + ? = 10
  4. 4.9 + ? = 10
  5. 5.13 + ? = 100
  6. 6.71 + ? = 100
  7. 7.8 + ? = 10
  8. 8.42 + ? = 100
  9. 9.45 + ? = 100
  10. 10.28 + ? = 100
  11. 11.17 + ? = 100
  12. 12.72 + ? = 100
  13. 13.2 + ? = 10
  14. 14.7 + ? = 10
  15. 15.1 + ? = 10
  16. 16.16 + ? = 100
  17. 17.44 + ? = 100
  18. 18.6 + ? = 10
  19. 19.86 + ? = 100
  20. 20.63 + ? = 100
  21. 21.82 + ? = 100
  22. 22.20 + ? = 100
  23. 23.3 + ? = 10
  24. 24.54 + ? = 100
  25. 25.67 + ? = 100
  26. 26.88 + ? = 100
  27. 27.40 + ? = 100
  28. 28.25 + ? = 100
  29. 29.39 + ? = 100
  30. 30.52 + ? = 100
  31. 31.66 + ? = 100
  32. 32.18 + ? = 100
  33. 33.19 + ? = 100
  34. 34.84 + ? = 100
  35. 35.21 + ? = 100
  36. 36.30 + ? = 100
  37. 37.85 + ? = 100
  38. 38.51 + ? = 100
  39. 39.69 + ? = 100
  40. 40.14 + ? = 100

Answer key

  1. 11
  2. 71
  3. 6
  4. 1
  5. 87
  6. 29
  7. 2
  8. 58
  9. 55
  10. 72
  11. 83
  12. 28
  13. 8
  14. 3
  15. 9
  16. 84
  17. 56
  18. 4
  19. 14
  20. 37
  21. 18
  22. 80
  23. 7
  24. 46
  25. 33
  26. 12
  27. 60
  28. 75
  29. 61
  30. 48
  31. 34
  32. 82
  33. 81
  34. 16
  35. 79
  36. 70
  37. 15
  38. 49
  39. 31
  40. 86

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