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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 132 · 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. 1.20 + ? = 100
  2. 2.43 + ? = 100
  3. 3.4 + ? = 10
  4. 4.66 + ? = 100
  5. 5.15 + ? = 100
  6. 6.6 + ? = 10
  7. 7.87 + ? = 100
  8. 8.12 + ? = 100
  9. 9.26 + ? = 100
  10. 10.49 + ? = 100
  11. 11.77 + ? = 100
  12. 12.33 + ? = 100
  13. 13.1 + ? = 10
  14. 14.9 + ? = 10
  15. 15.88 + ? = 100
  16. 16.8 + ? = 10
  17. 17.81 + ? = 100
  18. 18.2 + ? = 10
  19. 19.27 + ? = 100
  20. 20.60 + ? = 100
  21. 21.5 + ? = 10
  22. 22.39 + ? = 100
  23. 23.29 + ? = 100
  24. 24.3 + ? = 10
  25. 25.19 + ? = 100
  26. 26.42 + ? = 100
  27. 27.54 + ? = 100
  28. 28.7 + ? = 10
  29. 29.53 + ? = 100
  30. 30.70 + ? = 100
  31. 31.86 + ? = 100
  32. 32.89 + ? = 100
  33. 33.71 + ? = 100
  34. 34.14 + ? = 100
  35. 35.56 + ? = 100
  36. 36.32 + ? = 100
  37. 37.74 + ? = 100
  38. 38.51 + ? = 100
  39. 39.52 + ? = 100
  40. 40.18 + ? = 100

Answer key

  1. 80
  2. 57
  3. 6
  4. 34
  5. 85
  6. 4
  7. 13
  8. 88
  9. 74
  10. 51
  11. 23
  12. 67
  13. 9
  14. 1
  15. 12
  16. 2
  17. 19
  18. 8
  19. 73
  20. 40
  21. 5
  22. 61
  23. 71
  24. 7
  25. 81
  26. 58
  27. 46
  28. 3
  29. 47
  30. 30
  31. 14
  32. 11
  33. 29
  34. 86
  35. 44
  36. 68
  37. 26
  38. 49
  39. 48
  40. 82

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