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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 153 · 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. 2.3 + ? = 10
  3. 3.68 + ? = 100
  4. 4.25 + ? = 100
  5. 5.40 + ? = 100
  6. 6.1 + ? = 10
  7. 7.12 + ? = 100
  8. 8.2 + ? = 10
  9. 9.88 + ? = 100
  10. 10.7 + ? = 10
  11. 11.59 + ? = 100
  12. 12.8 + ? = 10
  13. 13.64 + ? = 100
  14. 14.4 + ? = 10
  15. 15.16 + ? = 100
  16. 16.39 + ? = 100
  17. 17.66 + ? = 100
  18. 18.13 + ? = 100
  19. 19.84 + ? = 100
  20. 20.56 + ? = 100
  21. 21.22 + ? = 100
  22. 22.6 + ? = 10
  23. 23.17 + ? = 100
  24. 24.78 + ? = 100
  25. 25.67 + ? = 100
  26. 26.54 + ? = 100
  27. 27.62 + ? = 100
  28. 28.31 + ? = 100
  29. 29.15 + ? = 100
  30. 30.81 + ? = 100
  31. 31.14 + ? = 100
  32. 32.37 + ? = 100
  33. 33.48 + ? = 100
  34. 34.27 + ? = 100
  35. 35.50 + ? = 100
  36. 36.41 + ? = 100
  37. 37.33 + ? = 100
  38. 38.38 + ? = 100
  39. 39.42 + ? = 100
  40. 40.57 + ? = 100

Answer key

  1. 1
  2. 7
  3. 32
  4. 75
  5. 60
  6. 9
  7. 88
  8. 8
  9. 12
  10. 3
  11. 41
  12. 2
  13. 36
  14. 6
  15. 84
  16. 61
  17. 34
  18. 87
  19. 16
  20. 44
  21. 78
  22. 4
  23. 83
  24. 22
  25. 33
  26. 46
  27. 38
  28. 69
  29. 85
  30. 19
  31. 86
  32. 63
  33. 52
  34. 73
  35. 50
  36. 59
  37. 67
  38. 62
  39. 58
  40. 43

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