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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 636 · 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. 1.3 + ? = 10
  2. 2.2 + ? = 10
  3. 3.39 + ? = 100
  4. 4.4 + ? = 10
  5. 5.33 + ? = 100
  6. 6.52 + ? = 100
  7. 7.12 + ? = 100
  8. 8.79 + ? = 100
  9. 9.29 + ? = 100
  10. 10.1 + ? = 10
  11. 11.7 + ? = 10
  12. 12.9 + ? = 10
  13. 13.46 + ? = 100
  14. 14.13 + ? = 100
  15. 15.8 + ? = 10
  16. 16.84 + ? = 100
  17. 17.63 + ? = 100
  18. 18.20 + ? = 100
  19. 19.80 + ? = 100
  20. 20.56 + ? = 100
  21. 21.5 + ? = 10
  22. 22.59 + ? = 100
  23. 23.67 + ? = 100
  24. 24.11 + ? = 100
  25. 25.68 + ? = 100
  26. 26.6 + ? = 10
  27. 27.41 + ? = 100
  28. 28.60 + ? = 100
  29. 29.70 + ? = 100
  30. 30.55 + ? = 100
  31. 31.82 + ? = 100
  32. 32.14 + ? = 100
  33. 33.17 + ? = 100
  34. 34.58 + ? = 100
  35. 35.71 + ? = 100
  36. 36.40 + ? = 100
  37. 37.44 + ? = 100
  38. 38.31 + ? = 100
  39. 39.65 + ? = 100
  40. 40.66 + ? = 100

Answer key

  1. 7
  2. 8
  3. 61
  4. 6
  5. 67
  6. 48
  7. 88
  8. 21
  9. 71
  10. 9
  11. 3
  12. 1
  13. 54
  14. 87
  15. 2
  16. 16
  17. 37
  18. 80
  19. 20
  20. 44
  21. 5
  22. 41
  23. 33
  24. 89
  25. 32
  26. 4
  27. 59
  28. 40
  29. 30
  30. 45
  31. 18
  32. 86
  33. 83
  34. 42
  35. 29
  36. 60
  37. 56
  38. 69
  39. 35
  40. 34

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