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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 664 · 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. 1.1 + ? = 10
  2. 2.5 + ? = 10
  3. 3.79 + ? = 100
  4. 4.32 + ? = 100
  5. 5.2 + ? = 10
  6. 6.85 + ? = 100
  7. 7.69 + ? = 100
  8. 8.11 + ? = 100
  9. 9.36 + ? = 100
  10. 10.47 + ? = 100
  11. 11.88 + ? = 100
  12. 12.71 + ? = 100
  13. 13.25 + ? = 100
  14. 14.8 + ? = 10
  15. 15.48 + ? = 100
  16. 16.38 + ? = 100
  17. 17.31 + ? = 100
  18. 18.16 + ? = 100
  19. 19.73 + ? = 100
  20. 20.3 + ? = 10
  21. 21.40 + ? = 100
  22. 22.21 + ? = 100
  23. 23.20 + ? = 100
  24. 24.63 + ? = 100
  25. 25.9 + ? = 10
  26. 26.41 + ? = 100
  27. 27.6 + ? = 10
  28. 28.55 + ? = 100
  29. 29.70 + ? = 100
  30. 30.4 + ? = 10
  31. 31.13 + ? = 100
  32. 32.42 + ? = 100
  33. 33.67 + ? = 100
  34. 34.7 + ? = 10
  35. 35.54 + ? = 100
  36. 36.44 + ? = 100
  37. 37.89 + ? = 100
  38. 38.74 + ? = 100
  39. 39.14 + ? = 100
  40. 40.17 + ? = 100

Answer key

  1. 9
  2. 5
  3. 21
  4. 68
  5. 8
  6. 15
  7. 31
  8. 89
  9. 64
  10. 53
  11. 12
  12. 29
  13. 75
  14. 2
  15. 52
  16. 62
  17. 69
  18. 84
  19. 27
  20. 7
  21. 60
  22. 79
  23. 80
  24. 37
  25. 1
  26. 59
  27. 4
  28. 45
  29. 30
  30. 6
  31. 87
  32. 58
  33. 33
  34. 3
  35. 46
  36. 56
  37. 11
  38. 26
  39. 86
  40. 83

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