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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 360 · 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. 1.7 + ? = 10
  2. 2.33 + ? = 100
  3. 3.1 + ? = 10
  4. 4.3 + ? = 10
  5. 5.5 + ? = 10
  6. 6.83 + ? = 100
  7. 7.8 + ? = 10
  8. 8.85 + ? = 100
  9. 9.13 + ? = 100
  10. 10.72 + ? = 100
  11. 11.25 + ? = 100
  12. 12.6 + ? = 10
  13. 13.78 + ? = 100
  14. 14.23 + ? = 100
  15. 15.74 + ? = 100
  16. 16.54 + ? = 100
  17. 17.9 + ? = 10
  18. 18.28 + ? = 100
  19. 19.2 + ? = 10
  20. 20.73 + ? = 100
  21. 21.88 + ? = 100
  22. 22.66 + ? = 100
  23. 23.51 + ? = 100
  24. 24.69 + ? = 100
  25. 25.57 + ? = 100
  26. 26.36 + ? = 100
  27. 27.4 + ? = 10
  28. 28.39 + ? = 100
  29. 29.50 + ? = 100
  30. 30.35 + ? = 100
  31. 31.62 + ? = 100
  32. 32.89 + ? = 100
  33. 33.45 + ? = 100
  34. 34.29 + ? = 100
  35. 35.21 + ? = 100
  36. 36.79 + ? = 100
  37. 37.53 + ? = 100
  38. 38.84 + ? = 100
  39. 39.82 + ? = 100
  40. 40.22 + ? = 100

Answer key

  1. 3
  2. 67
  3. 9
  4. 7
  5. 5
  6. 17
  7. 2
  8. 15
  9. 87
  10. 28
  11. 75
  12. 4
  13. 22
  14. 77
  15. 26
  16. 46
  17. 1
  18. 72
  19. 8
  20. 27
  21. 12
  22. 34
  23. 49
  24. 31
  25. 43
  26. 64
  27. 6
  28. 61
  29. 50
  30. 65
  31. 38
  32. 11
  33. 55
  34. 71
  35. 79
  36. 21
  37. 47
  38. 16
  39. 18
  40. 78

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