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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 80 · 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. 1.67 + ? = 100
  2. 2.4 + ? = 10
  3. 3.3 + ? = 10
  4. 4.88 + ? = 100
  5. 5.41 + ? = 100
  6. 6.83 + ? = 100
  7. 7.84 + ? = 100
  8. 8.76 + ? = 100
  9. 9.51 + ? = 100
  10. 10.73 + ? = 100
  11. 11.43 + ? = 100
  12. 12.65 + ? = 100
  13. 13.7 + ? = 10
  14. 14.54 + ? = 100
  15. 15.17 + ? = 100
  16. 16.81 + ? = 100
  17. 17.22 + ? = 100
  18. 18.16 + ? = 100
  19. 19.1 + ? = 10
  20. 20.6 + ? = 10
  21. 21.13 + ? = 100
  22. 22.9 + ? = 10
  23. 23.23 + ? = 100
  24. 24.28 + ? = 100
  25. 25.14 + ? = 100
  26. 26.34 + ? = 100
  27. 27.2 + ? = 10
  28. 28.5 + ? = 10
  29. 29.82 + ? = 100
  30. 30.78 + ? = 100
  31. 31.27 + ? = 100
  32. 32.53 + ? = 100
  33. 33.20 + ? = 100
  34. 34.46 + ? = 100
  35. 35.32 + ? = 100
  36. 36.66 + ? = 100
  37. 37.87 + ? = 100
  38. 38.39 + ? = 100
  39. 39.62 + ? = 100
  40. 40.47 + ? = 100

Answer key

  1. 33
  2. 6
  3. 7
  4. 12
  5. 59
  6. 17
  7. 16
  8. 24
  9. 49
  10. 27
  11. 57
  12. 35
  13. 3
  14. 46
  15. 83
  16. 19
  17. 78
  18. 84
  19. 9
  20. 4
  21. 87
  22. 1
  23. 77
  24. 72
  25. 86
  26. 66
  27. 8
  28. 5
  29. 18
  30. 22
  31. 73
  32. 47
  33. 80
  34. 54
  35. 68
  36. 34
  37. 13
  38. 61
  39. 38
  40. 53

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