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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 760 · 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. 1.2 + ? = 10
  2. 2.83 + ? = 100
  3. 3.4 + ? = 10
  4. 4.82 + ? = 100
  5. 5.1 + ? = 10
  6. 6.9 + ? = 10
  7. 7.72 + ? = 100
  8. 8.21 + ? = 100
  9. 9.86 + ? = 100
  10. 10.46 + ? = 100
  11. 11.24 + ? = 100
  12. 12.66 + ? = 100
  13. 13.68 + ? = 100
  14. 14.63 + ? = 100
  15. 15.45 + ? = 100
  16. 16.5 + ? = 10
  17. 17.3 + ? = 10
  18. 18.7 + ? = 10
  19. 19.31 + ? = 100
  20. 20.62 + ? = 100
  21. 21.51 + ? = 100
  22. 22.74 + ? = 100
  23. 23.73 + ? = 100
  24. 24.16 + ? = 100
  25. 25.35 + ? = 100
  26. 26.6 + ? = 10
  27. 27.32 + ? = 100
  28. 28.19 + ? = 100
  29. 29.39 + ? = 100
  30. 30.49 + ? = 100
  31. 31.78 + ? = 100
  32. 32.81 + ? = 100
  33. 33.14 + ? = 100
  34. 34.44 + ? = 100
  35. 35.33 + ? = 100
  36. 36.42 + ? = 100
  37. 37.71 + ? = 100
  38. 38.61 + ? = 100
  39. 39.69 + ? = 100
  40. 40.60 + ? = 100

Answer key

  1. 8
  2. 17
  3. 6
  4. 18
  5. 9
  6. 1
  7. 28
  8. 79
  9. 14
  10. 54
  11. 76
  12. 34
  13. 32
  14. 37
  15. 55
  16. 5
  17. 7
  18. 3
  19. 69
  20. 38
  21. 49
  22. 26
  23. 27
  24. 84
  25. 65
  26. 4
  27. 68
  28. 81
  29. 61
  30. 51
  31. 22
  32. 19
  33. 86
  34. 56
  35. 67
  36. 58
  37. 29
  38. 39
  39. 31
  40. 40

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