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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 87 · 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. 1.58 + ? = 100
  2. 2.31 + ? = 100
  3. 3.2 + ? = 10
  4. 4.4 + ? = 10
  5. 5.32 + ? = 100
  6. 6.1 + ? = 10
  7. 7.8 + ? = 10
  8. 8.72 + ? = 100
  9. 9.59 + ? = 100
  10. 10.7 + ? = 10
  11. 11.52 + ? = 100
  12. 12.9 + ? = 10
  13. 13.56 + ? = 100
  14. 14.89 + ? = 100
  15. 15.73 + ? = 100
  16. 16.42 + ? = 100
  17. 17.53 + ? = 100
  18. 18.75 + ? = 100
  19. 19.5 + ? = 10
  20. 20.19 + ? = 100
  21. 21.3 + ? = 10
  22. 22.6 + ? = 10
  23. 23.50 + ? = 100
  24. 24.85 + ? = 100
  25. 25.45 + ? = 100
  26. 26.13 + ? = 100
  27. 27.39 + ? = 100
  28. 28.82 + ? = 100
  29. 29.87 + ? = 100
  30. 30.70 + ? = 100
  31. 31.63 + ? = 100
  32. 32.30 + ? = 100
  33. 33.61 + ? = 100
  34. 34.78 + ? = 100
  35. 35.79 + ? = 100
  36. 36.16 + ? = 100
  37. 37.74 + ? = 100
  38. 38.64 + ? = 100
  39. 39.83 + ? = 100
  40. 40.41 + ? = 100

Answer key

  1. 42
  2. 69
  3. 8
  4. 6
  5. 68
  6. 9
  7. 2
  8. 28
  9. 41
  10. 3
  11. 48
  12. 1
  13. 44
  14. 11
  15. 27
  16. 58
  17. 47
  18. 25
  19. 5
  20. 81
  21. 7
  22. 4
  23. 50
  24. 15
  25. 55
  26. 87
  27. 61
  28. 18
  29. 13
  30. 30
  31. 37
  32. 70
  33. 39
  34. 22
  35. 21
  36. 84
  37. 26
  38. 36
  39. 17
  40. 59

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