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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 229 · 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. 1.67 + ? = 100
  2. 2.32 + ? = 100
  3. 3.5 + ? = 10
  4. 4.13 + ? = 100
  5. 5.28 + ? = 100
  6. 6.38 + ? = 100
  7. 7.33 + ? = 100
  8. 8.4 + ? = 10
  9. 9.9 + ? = 10
  10. 10.3 + ? = 10
  11. 11.36 + ? = 100
  12. 12.26 + ? = 100
  13. 13.7 + ? = 10
  14. 14.41 + ? = 100
  15. 15.62 + ? = 100
  16. 16.89 + ? = 100
  17. 17.61 + ? = 100
  18. 18.35 + ? = 100
  19. 19.66 + ? = 100
  20. 20.43 + ? = 100
  21. 21.63 + ? = 100
  22. 22.1 + ? = 10
  23. 23.71 + ? = 100
  24. 24.6 + ? = 10
  25. 25.2 + ? = 10
  26. 26.87 + ? = 100
  27. 27.46 + ? = 100
  28. 28.74 + ? = 100
  29. 29.37 + ? = 100
  30. 30.77 + ? = 100
  31. 31.60 + ? = 100
  32. 32.52 + ? = 100
  33. 33.69 + ? = 100
  34. 34.16 + ? = 100
  35. 35.8 + ? = 10
  36. 36.39 + ? = 100
  37. 37.23 + ? = 100
  38. 38.47 + ? = 100
  39. 39.11 + ? = 100
  40. 40.17 + ? = 100

Answer key

  1. 33
  2. 68
  3. 5
  4. 87
  5. 72
  6. 62
  7. 67
  8. 6
  9. 1
  10. 7
  11. 64
  12. 74
  13. 3
  14. 59
  15. 38
  16. 11
  17. 39
  18. 65
  19. 34
  20. 57
  21. 37
  22. 9
  23. 29
  24. 4
  25. 8
  26. 13
  27. 54
  28. 26
  29. 63
  30. 23
  31. 40
  32. 48
  33. 31
  34. 84
  35. 2
  36. 61
  37. 77
  38. 53
  39. 89
  40. 83

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