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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 660 · 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. 1.84 + ? = 100
  2. 2.7 + ? = 10
  3. 3.39 + ? = 100
  4. 4.28 + ? = 100
  5. 5.20 + ? = 100
  6. 6.81 + ? = 100
  7. 7.3 + ? = 10
  8. 8.50 + ? = 100
  9. 9.11 + ? = 100
  10. 10.5 + ? = 10
  11. 11.52 + ? = 100
  12. 12.13 + ? = 100
  13. 13.1 + ? = 10
  14. 14.4 + ? = 10
  15. 15.42 + ? = 100
  16. 16.86 + ? = 100
  17. 17.24 + ? = 100
  18. 18.2 + ? = 10
  19. 19.30 + ? = 100
  20. 20.68 + ? = 100
  21. 21.8 + ? = 10
  22. 22.6 + ? = 10
  23. 23.9 + ? = 10
  24. 24.53 + ? = 100
  25. 25.41 + ? = 100
  26. 26.17 + ? = 100
  27. 27.79 + ? = 100
  28. 28.40 + ? = 100
  29. 29.85 + ? = 100
  30. 30.15 + ? = 100
  31. 31.19 + ? = 100
  32. 32.12 + ? = 100
  33. 33.64 + ? = 100
  34. 34.26 + ? = 100
  35. 35.76 + ? = 100
  36. 36.46 + ? = 100
  37. 37.23 + ? = 100
  38. 38.65 + ? = 100
  39. 39.49 + ? = 100
  40. 40.36 + ? = 100

Answer key

  1. 16
  2. 3
  3. 61
  4. 72
  5. 80
  6. 19
  7. 7
  8. 50
  9. 89
  10. 5
  11. 48
  12. 87
  13. 9
  14. 6
  15. 58
  16. 14
  17. 76
  18. 8
  19. 70
  20. 32
  21. 2
  22. 4
  23. 1
  24. 47
  25. 59
  26. 83
  27. 21
  28. 60
  29. 15
  30. 85
  31. 81
  32. 88
  33. 36
  34. 74
  35. 24
  36. 54
  37. 77
  38. 35
  39. 51
  40. 64

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