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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 41 · 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. 1.13 + ? = 100
  2. 2.18 + ? = 100
  3. 3.65 + ? = 100
  4. 4.9 + ? = 10
  5. 5.60 + ? = 100
  6. 6.7 + ? = 10
  7. 7.79 + ? = 100
  8. 8.2 + ? = 10
  9. 9.76 + ? = 100
  10. 10.59 + ? = 100
  11. 11.58 + ? = 100
  12. 12.80 + ? = 100
  13. 13.89 + ? = 100
  14. 14.6 + ? = 10
  15. 15.25 + ? = 100
  16. 16.67 + ? = 100
  17. 17.4 + ? = 10
  18. 18.1 + ? = 10
  19. 19.52 + ? = 100
  20. 20.39 + ? = 100
  21. 21.8 + ? = 10
  22. 22.32 + ? = 100
  23. 23.3 + ? = 10
  24. 24.51 + ? = 100
  25. 25.63 + ? = 100
  26. 26.53 + ? = 100
  27. 27.33 + ? = 100
  28. 28.19 + ? = 100
  29. 29.44 + ? = 100
  30. 30.75 + ? = 100
  31. 31.36 + ? = 100
  32. 32.30 + ? = 100
  33. 33.66 + ? = 100
  34. 34.42 + ? = 100
  35. 35.17 + ? = 100
  36. 36.22 + ? = 100
  37. 37.69 + ? = 100
  38. 38.81 + ? = 100
  39. 39.46 + ? = 100
  40. 40.40 + ? = 100

Answer key

  1. 87
  2. 82
  3. 35
  4. 1
  5. 40
  6. 3
  7. 21
  8. 8
  9. 24
  10. 41
  11. 42
  12. 20
  13. 11
  14. 4
  15. 75
  16. 33
  17. 6
  18. 9
  19. 48
  20. 61
  21. 2
  22. 68
  23. 7
  24. 49
  25. 37
  26. 47
  27. 67
  28. 81
  29. 56
  30. 25
  31. 64
  32. 70
  33. 34
  34. 58
  35. 83
  36. 78
  37. 31
  38. 19
  39. 54
  40. 60

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