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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 237 · 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. 1.75 + ? = 100
  2. 2.69 + ? = 100
  3. 3.84 + ? = 100
  4. 4.8 + ? = 10
  5. 5.76 + ? = 100
  6. 6.1 + ? = 10
  7. 7.36 + ? = 100
  8. 8.4 + ? = 10
  9. 9.6 + ? = 10
  10. 10.9 + ? = 10
  11. 11.13 + ? = 100
  12. 12.7 + ? = 10
  13. 13.3 + ? = 10
  14. 14.79 + ? = 100
  15. 15.35 + ? = 100
  16. 16.2 + ? = 10
  17. 17.52 + ? = 100
  18. 18.85 + ? = 100
  19. 19.59 + ? = 100
  20. 20.5 + ? = 10
  21. 21.65 + ? = 100
  22. 22.26 + ? = 100
  23. 23.51 + ? = 100
  24. 24.38 + ? = 100
  25. 25.20 + ? = 100
  26. 26.81 + ? = 100
  27. 27.54 + ? = 100
  28. 28.83 + ? = 100
  29. 29.82 + ? = 100
  30. 30.14 + ? = 100
  31. 31.42 + ? = 100
  32. 32.50 + ? = 100
  33. 33.33 + ? = 100
  34. 34.67 + ? = 100
  35. 35.41 + ? = 100
  36. 36.64 + ? = 100
  37. 37.30 + ? = 100
  38. 38.19 + ? = 100
  39. 39.71 + ? = 100
  40. 40.70 + ? = 100

Answer key

  1. 25
  2. 31
  3. 16
  4. 2
  5. 24
  6. 9
  7. 64
  8. 6
  9. 4
  10. 1
  11. 87
  12. 3
  13. 7
  14. 21
  15. 65
  16. 8
  17. 48
  18. 15
  19. 41
  20. 5
  21. 35
  22. 74
  23. 49
  24. 62
  25. 80
  26. 19
  27. 46
  28. 17
  29. 18
  30. 86
  31. 58
  32. 50
  33. 67
  34. 33
  35. 59
  36. 36
  37. 70
  38. 81
  39. 29
  40. 30

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