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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 603 · 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. 2.6 + ? = 10
  3. 3.17 + ? = 100
  4. 4.1 + ? = 10
  5. 5.3 + ? = 10
  6. 6.31 + ? = 100
  7. 7.12 + ? = 100
  8. 8.78 + ? = 100
  9. 9.4 + ? = 10
  10. 10.9 + ? = 10
  11. 11.60 + ? = 100
  12. 12.66 + ? = 100
  13. 13.25 + ? = 100
  14. 14.7 + ? = 10
  15. 15.81 + ? = 100
  16. 16.42 + ? = 100
  17. 17.86 + ? = 100
  18. 18.47 + ? = 100
  19. 19.87 + ? = 100
  20. 20.8 + ? = 10
  21. 21.52 + ? = 100
  22. 22.73 + ? = 100
  23. 23.55 + ? = 100
  24. 24.80 + ? = 100
  25. 25.84 + ? = 100
  26. 26.16 + ? = 100
  27. 27.32 + ? = 100
  28. 28.5 + ? = 10
  29. 29.88 + ? = 100
  30. 30.38 + ? = 100
  31. 31.30 + ? = 100
  32. 32.18 + ? = 100
  33. 33.11 + ? = 100
  34. 34.83 + ? = 100
  35. 35.13 + ? = 100
  36. 36.79 + ? = 100
  37. 37.33 + ? = 100
  38. 38.41 + ? = 100
  39. 39.77 + ? = 100
  40. 40.20 + ? = 100

Answer key

  1. 8
  2. 4
  3. 83
  4. 9
  5. 7
  6. 69
  7. 88
  8. 22
  9. 6
  10. 1
  11. 40
  12. 34
  13. 75
  14. 3
  15. 19
  16. 58
  17. 14
  18. 53
  19. 13
  20. 2
  21. 48
  22. 27
  23. 45
  24. 20
  25. 16
  26. 84
  27. 68
  28. 5
  29. 12
  30. 62
  31. 70
  32. 82
  33. 89
  34. 17
  35. 87
  36. 21
  37. 67
  38. 59
  39. 23
  40. 80

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