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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 275 · 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. 1.46 + ? = 100
  2. 2.2 + ? = 10
  3. 3.4 + ? = 10
  4. 4.1 + ? = 10
  5. 5.8 + ? = 10
  6. 6.54 + ? = 100
  7. 7.9 + ? = 10
  8. 8.59 + ? = 100
  9. 9.32 + ? = 100
  10. 10.3 + ? = 10
  11. 11.72 + ? = 100
  12. 12.5 + ? = 10
  13. 13.6 + ? = 10
  14. 14.35 + ? = 100
  15. 15.29 + ? = 100
  16. 16.36 + ? = 100
  17. 17.27 + ? = 100
  18. 18.24 + ? = 100
  19. 19.53 + ? = 100
  20. 20.60 + ? = 100
  21. 21.7 + ? = 10
  22. 22.18 + ? = 100
  23. 23.57 + ? = 100
  24. 24.87 + ? = 100
  25. 25.77 + ? = 100
  26. 26.81 + ? = 100
  27. 27.26 + ? = 100
  28. 28.56 + ? = 100
  29. 29.82 + ? = 100
  30. 30.41 + ? = 100
  31. 31.80 + ? = 100
  32. 32.47 + ? = 100
  33. 33.28 + ? = 100
  34. 34.19 + ? = 100
  35. 35.71 + ? = 100
  36. 36.75 + ? = 100
  37. 37.12 + ? = 100
  38. 38.62 + ? = 100
  39. 39.58 + ? = 100
  40. 40.39 + ? = 100

Answer key

  1. 54
  2. 8
  3. 6
  4. 9
  5. 2
  6. 46
  7. 1
  8. 41
  9. 68
  10. 7
  11. 28
  12. 5
  13. 4
  14. 65
  15. 71
  16. 64
  17. 73
  18. 76
  19. 47
  20. 40
  21. 3
  22. 82
  23. 43
  24. 13
  25. 23
  26. 19
  27. 74
  28. 44
  29. 18
  30. 59
  31. 20
  32. 53
  33. 72
  34. 81
  35. 29
  36. 25
  37. 88
  38. 38
  39. 42
  40. 61

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