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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 353 · 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. 1.17 + ? = 100
  2. 2.78 + ? = 100
  3. 3.53 + ? = 100
  4. 4.2 + ? = 10
  5. 5.52 + ? = 100
  6. 6.33 + ? = 100
  7. 7.6 + ? = 10
  8. 8.1 + ? = 10
  9. 9.3 + ? = 10
  10. 10.59 + ? = 100
  11. 11.21 + ? = 100
  12. 12.28 + ? = 100
  13. 13.4 + ? = 10
  14. 14.63 + ? = 100
  15. 15.77 + ? = 100
  16. 16.49 + ? = 100
  17. 17.71 + ? = 100
  18. 18.11 + ? = 100
  19. 19.15 + ? = 100
  20. 20.16 + ? = 100
  21. 21.37 + ? = 100
  22. 22.35 + ? = 100
  23. 23.5 + ? = 10
  24. 24.9 + ? = 10
  25. 25.32 + ? = 100
  26. 26.80 + ? = 100
  27. 27.79 + ? = 100
  28. 28.66 + ? = 100
  29. 29.8 + ? = 10
  30. 30.23 + ? = 100
  31. 31.68 + ? = 100
  32. 32.7 + ? = 10
  33. 33.13 + ? = 100
  34. 34.30 + ? = 100
  35. 35.89 + ? = 100
  36. 36.54 + ? = 100
  37. 37.72 + ? = 100
  38. 38.81 + ? = 100
  39. 39.85 + ? = 100
  40. 40.56 + ? = 100

Answer key

  1. 83
  2. 22
  3. 47
  4. 8
  5. 48
  6. 67
  7. 4
  8. 9
  9. 7
  10. 41
  11. 79
  12. 72
  13. 6
  14. 37
  15. 23
  16. 51
  17. 29
  18. 89
  19. 85
  20. 84
  21. 63
  22. 65
  23. 5
  24. 1
  25. 68
  26. 20
  27. 21
  28. 34
  29. 2
  30. 77
  31. 32
  32. 3
  33. 87
  34. 70
  35. 11
  36. 46
  37. 28
  38. 19
  39. 15
  40. 44

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