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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 126 · 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. 1.66 + ? = 100
  2. 2.1 + ? = 10
  3. 3.5 + ? = 10
  4. 4.2 + ? = 10
  5. 5.3 + ? = 10
  6. 6.76 + ? = 100
  7. 7.72 + ? = 100
  8. 8.74 + ? = 100
  9. 9.28 + ? = 100
  10. 10.51 + ? = 100
  11. 11.78 + ? = 100
  12. 12.62 + ? = 100
  13. 13.80 + ? = 100
  14. 14.73 + ? = 100
  15. 15.7 + ? = 10
  16. 16.6 + ? = 10
  17. 17.42 + ? = 100
  18. 18.14 + ? = 100
  19. 19.4 + ? = 10
  20. 20.55 + ? = 100
  21. 21.9 + ? = 10
  22. 22.39 + ? = 100
  23. 23.60 + ? = 100
  24. 24.36 + ? = 100
  25. 25.71 + ? = 100
  26. 26.38 + ? = 100
  27. 27.64 + ? = 100
  28. 28.68 + ? = 100
  29. 29.11 + ? = 100
  30. 30.20 + ? = 100
  31. 31.46 + ? = 100
  32. 32.19 + ? = 100
  33. 33.44 + ? = 100
  34. 34.8 + ? = 10
  35. 35.58 + ? = 100
  36. 36.43 + ? = 100
  37. 37.31 + ? = 100
  38. 38.17 + ? = 100
  39. 39.88 + ? = 100
  40. 40.27 + ? = 100

Answer key

  1. 34
  2. 9
  3. 5
  4. 8
  5. 7
  6. 24
  7. 28
  8. 26
  9. 72
  10. 49
  11. 22
  12. 38
  13. 20
  14. 27
  15. 3
  16. 4
  17. 58
  18. 86
  19. 6
  20. 45
  21. 1
  22. 61
  23. 40
  24. 64
  25. 29
  26. 62
  27. 36
  28. 32
  29. 89
  30. 80
  31. 54
  32. 81
  33. 56
  34. 2
  35. 42
  36. 57
  37. 69
  38. 83
  39. 12
  40. 73

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