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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 486 · 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. 1.9 + ? = 10
  2. 2.54 + ? = 100
  3. 3.1 + ? = 10
  4. 4.31 + ? = 100
  5. 5.2 + ? = 10
  6. 6.8 + ? = 10
  7. 7.3 + ? = 10
  8. 8.7 + ? = 10
  9. 9.72 + ? = 100
  10. 10.6 + ? = 10
  11. 11.5 + ? = 10
  12. 12.4 + ? = 10
  13. 13.32 + ? = 100
  14. 14.38 + ? = 100
  15. 15.29 + ? = 100
  16. 16.36 + ? = 100
  17. 17.64 + ? = 100
  18. 18.78 + ? = 100
  19. 19.85 + ? = 100
  20. 20.48 + ? = 100
  21. 21.53 + ? = 100
  22. 22.56 + ? = 100
  23. 23.43 + ? = 100
  24. 24.27 + ? = 100
  25. 25.71 + ? = 100
  26. 26.65 + ? = 100
  27. 27.73 + ? = 100
  28. 28.22 + ? = 100
  29. 29.80 + ? = 100
  30. 30.13 + ? = 100
  31. 31.66 + ? = 100
  32. 32.70 + ? = 100
  33. 33.79 + ? = 100
  34. 34.57 + ? = 100
  35. 35.84 + ? = 100
  36. 36.24 + ? = 100
  37. 37.62 + ? = 100
  38. 38.83 + ? = 100
  39. 39.50 + ? = 100
  40. 40.39 + ? = 100

Answer key

  1. 1
  2. 46
  3. 9
  4. 69
  5. 8
  6. 2
  7. 7
  8. 3
  9. 28
  10. 4
  11. 5
  12. 6
  13. 68
  14. 62
  15. 71
  16. 64
  17. 36
  18. 22
  19. 15
  20. 52
  21. 47
  22. 44
  23. 57
  24. 73
  25. 29
  26. 35
  27. 27
  28. 78
  29. 20
  30. 87
  31. 34
  32. 30
  33. 21
  34. 43
  35. 16
  36. 76
  37. 38
  38. 17
  39. 50
  40. 61

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