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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 656 · 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. 1.62 + ? = 100
  2. 2.9 + ? = 10
  3. 3.8 + ? = 10
  4. 4.6 + ? = 10
  5. 5.17 + ? = 100
  6. 6.85 + ? = 100
  7. 7.4 + ? = 10
  8. 8.67 + ? = 100
  9. 9.61 + ? = 100
  10. 10.86 + ? = 100
  11. 11.3 + ? = 10
  12. 12.24 + ? = 100
  13. 13.37 + ? = 100
  14. 14.77 + ? = 100
  15. 15.84 + ? = 100
  16. 16.1 + ? = 10
  17. 17.31 + ? = 100
  18. 18.71 + ? = 100
  19. 19.58 + ? = 100
  20. 20.43 + ? = 100
  21. 21.60 + ? = 100
  22. 22.82 + ? = 100
  23. 23.70 + ? = 100
  24. 24.2 + ? = 10
  25. 25.41 + ? = 100
  26. 26.5 + ? = 10
  27. 27.80 + ? = 100
  28. 28.13 + ? = 100
  29. 29.7 + ? = 10
  30. 30.35 + ? = 100
  31. 31.48 + ? = 100
  32. 32.38 + ? = 100
  33. 33.65 + ? = 100
  34. 34.15 + ? = 100
  35. 35.59 + ? = 100
  36. 36.76 + ? = 100
  37. 37.28 + ? = 100
  38. 38.32 + ? = 100
  39. 39.46 + ? = 100
  40. 40.72 + ? = 100

Answer key

  1. 38
  2. 1
  3. 2
  4. 4
  5. 83
  6. 15
  7. 6
  8. 33
  9. 39
  10. 14
  11. 7
  12. 76
  13. 63
  14. 23
  15. 16
  16. 9
  17. 69
  18. 29
  19. 42
  20. 57
  21. 40
  22. 18
  23. 30
  24. 8
  25. 59
  26. 5
  27. 20
  28. 87
  29. 3
  30. 65
  31. 52
  32. 62
  33. 35
  34. 85
  35. 41
  36. 24
  37. 72
  38. 68
  39. 54
  40. 28

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