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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 683 · 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. 1.41 + ? = 100
  2. 2.84 + ? = 100
  3. 3.3 + ? = 10
  4. 4.46 + ? = 100
  5. 5.16 + ? = 100
  6. 6.1 + ? = 10
  7. 7.59 + ? = 100
  8. 8.15 + ? = 100
  9. 9.7 + ? = 10
  10. 10.13 + ? = 100
  11. 11.8 + ? = 10
  12. 12.36 + ? = 100
  13. 13.32 + ? = 100
  14. 14.37 + ? = 100
  15. 15.83 + ? = 100
  16. 16.82 + ? = 100
  17. 17.55 + ? = 100
  18. 18.14 + ? = 100
  19. 19.20 + ? = 100
  20. 20.45 + ? = 100
  21. 21.39 + ? = 100
  22. 22.9 + ? = 10
  23. 23.87 + ? = 100
  24. 24.2 + ? = 10
  25. 25.6 + ? = 10
  26. 26.25 + ? = 100
  27. 27.43 + ? = 100
  28. 28.5 + ? = 10
  29. 29.33 + ? = 100
  30. 30.35 + ? = 100
  31. 31.49 + ? = 100
  32. 32.23 + ? = 100
  33. 33.4 + ? = 10
  34. 34.27 + ? = 100
  35. 35.31 + ? = 100
  36. 36.75 + ? = 100
  37. 37.73 + ? = 100
  38. 38.53 + ? = 100
  39. 39.57 + ? = 100
  40. 40.11 + ? = 100

Answer key

  1. 59
  2. 16
  3. 7
  4. 54
  5. 84
  6. 9
  7. 41
  8. 85
  9. 3
  10. 87
  11. 2
  12. 64
  13. 68
  14. 63
  15. 17
  16. 18
  17. 45
  18. 86
  19. 80
  20. 55
  21. 61
  22. 1
  23. 13
  24. 8
  25. 4
  26. 75
  27. 57
  28. 5
  29. 67
  30. 65
  31. 51
  32. 77
  33. 6
  34. 73
  35. 69
  36. 25
  37. 27
  38. 47
  39. 43
  40. 89

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