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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 388 · 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. 1.14 + ? = 100
  2. 2.5 + ? = 10
  3. 3.39 + ? = 100
  4. 4.2 + ? = 10
  5. 5.76 + ? = 100
  6. 6.1 + ? = 10
  7. 7.32 + ? = 100
  8. 8.4 + ? = 10
  9. 9.61 + ? = 100
  10. 10.33 + ? = 100
  11. 11.89 + ? = 100
  12. 12.9 + ? = 10
  13. 13.47 + ? = 100
  14. 14.21 + ? = 100
  15. 15.40 + ? = 100
  16. 16.3 + ? = 10
  17. 17.6 + ? = 10
  18. 18.71 + ? = 100
  19. 19.12 + ? = 100
  20. 20.8 + ? = 10
  21. 21.36 + ? = 100
  22. 22.24 + ? = 100
  23. 23.43 + ? = 100
  24. 24.22 + ? = 100
  25. 25.68 + ? = 100
  26. 26.50 + ? = 100
  27. 27.67 + ? = 100
  28. 28.53 + ? = 100
  29. 29.87 + ? = 100
  30. 30.34 + ? = 100
  31. 31.7 + ? = 10
  32. 32.59 + ? = 100
  33. 33.45 + ? = 100
  34. 34.28 + ? = 100
  35. 35.51 + ? = 100
  36. 36.83 + ? = 100
  37. 37.30 + ? = 100
  38. 38.70 + ? = 100
  39. 39.88 + ? = 100
  40. 40.17 + ? = 100

Answer key

  1. 86
  2. 5
  3. 61
  4. 8
  5. 24
  6. 9
  7. 68
  8. 6
  9. 39
  10. 67
  11. 11
  12. 1
  13. 53
  14. 79
  15. 60
  16. 7
  17. 4
  18. 29
  19. 88
  20. 2
  21. 64
  22. 76
  23. 57
  24. 78
  25. 32
  26. 50
  27. 33
  28. 47
  29. 13
  30. 66
  31. 3
  32. 41
  33. 55
  34. 72
  35. 49
  36. 17
  37. 70
  38. 30
  39. 12
  40. 83

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