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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 386 · 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. 1.16 + ? = 100
  2. 2.34 + ? = 100
  3. 3.70 + ? = 100
  4. 4.7 + ? = 10
  5. 5.8 + ? = 10
  6. 6.42 + ? = 100
  7. 7.39 + ? = 100
  8. 8.4 + ? = 10
  9. 9.14 + ? = 100
  10. 10.54 + ? = 100
  11. 11.6 + ? = 10
  12. 12.1 + ? = 10
  13. 13.9 + ? = 10
  14. 14.2 + ? = 10
  15. 15.74 + ? = 100
  16. 16.53 + ? = 100
  17. 17.24 + ? = 100
  18. 18.5 + ? = 10
  19. 19.11 + ? = 100
  20. 20.75 + ? = 100
  21. 21.47 + ? = 100
  22. 22.40 + ? = 100
  23. 23.19 + ? = 100
  24. 24.82 + ? = 100
  25. 25.89 + ? = 100
  26. 26.85 + ? = 100
  27. 27.49 + ? = 100
  28. 28.72 + ? = 100
  29. 29.3 + ? = 10
  30. 30.62 + ? = 100
  31. 31.63 + ? = 100
  32. 32.26 + ? = 100
  33. 33.12 + ? = 100
  34. 34.28 + ? = 100
  35. 35.27 + ? = 100
  36. 36.52 + ? = 100
  37. 37.73 + ? = 100
  38. 38.38 + ? = 100
  39. 39.25 + ? = 100
  40. 40.13 + ? = 100

Answer key

  1. 84
  2. 66
  3. 30
  4. 3
  5. 2
  6. 58
  7. 61
  8. 6
  9. 86
  10. 46
  11. 4
  12. 9
  13. 1
  14. 8
  15. 26
  16. 47
  17. 76
  18. 5
  19. 89
  20. 25
  21. 53
  22. 60
  23. 81
  24. 18
  25. 11
  26. 15
  27. 51
  28. 28
  29. 7
  30. 38
  31. 37
  32. 74
  33. 88
  34. 72
  35. 73
  36. 48
  37. 27
  38. 62
  39. 75
  40. 87

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