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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 7 · 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. 1.14 + ? = 100
  2. 2.84 + ? = 100
  3. 3.5 + ? = 10
  4. 4.3 + ? = 10
  5. 5.53 + ? = 100
  6. 6.79 + ? = 100
  7. 7.8 + ? = 10
  8. 8.20 + ? = 100
  9. 9.4 + ? = 10
  10. 10.23 + ? = 100
  11. 11.6 + ? = 10
  12. 12.22 + ? = 100
  13. 13.1 + ? = 10
  14. 14.2 + ? = 10
  15. 15.7 + ? = 10
  16. 16.16 + ? = 100
  17. 17.11 + ? = 100
  18. 18.24 + ? = 100
  19. 19.28 + ? = 100
  20. 20.67 + ? = 100
  21. 21.86 + ? = 100
  22. 22.85 + ? = 100
  23. 23.9 + ? = 10
  24. 24.70 + ? = 100
  25. 25.61 + ? = 100
  26. 26.57 + ? = 100
  27. 27.21 + ? = 100
  28. 28.74 + ? = 100
  29. 29.32 + ? = 100
  30. 30.51 + ? = 100
  31. 31.55 + ? = 100
  32. 32.73 + ? = 100
  33. 33.81 + ? = 100
  34. 34.89 + ? = 100
  35. 35.65 + ? = 100
  36. 36.15 + ? = 100
  37. 37.47 + ? = 100
  38. 38.82 + ? = 100
  39. 39.58 + ? = 100
  40. 40.34 + ? = 100

Answer key

  1. 86
  2. 16
  3. 5
  4. 7
  5. 47
  6. 21
  7. 2
  8. 80
  9. 6
  10. 77
  11. 4
  12. 78
  13. 9
  14. 8
  15. 3
  16. 84
  17. 89
  18. 76
  19. 72
  20. 33
  21. 14
  22. 15
  23. 1
  24. 30
  25. 39
  26. 43
  27. 79
  28. 26
  29. 68
  30. 49
  31. 45
  32. 27
  33. 19
  34. 11
  35. 35
  36. 85
  37. 53
  38. 18
  39. 42
  40. 66

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