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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 57 · 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. 1.17 + ? = 100
  2. 2.9 + ? = 10
  3. 3.4 + ? = 10
  4. 4.80 + ? = 100
  5. 5.7 + ? = 10
  6. 6.67 + ? = 100
  7. 7.24 + ? = 100
  8. 8.23 + ? = 100
  9. 9.85 + ? = 100
  10. 10.50 + ? = 100
  11. 11.38 + ? = 100
  12. 12.6 + ? = 10
  13. 13.70 + ? = 100
  14. 14.1 + ? = 10
  15. 15.78 + ? = 100
  16. 16.8 + ? = 10
  17. 17.41 + ? = 100
  18. 18.25 + ? = 100
  19. 19.32 + ? = 100
  20. 20.36 + ? = 100
  21. 21.33 + ? = 100
  22. 22.71 + ? = 100
  23. 23.28 + ? = 100
  24. 24.5 + ? = 10
  25. 25.22 + ? = 100
  26. 26.3 + ? = 10
  27. 27.53 + ? = 100
  28. 28.2 + ? = 10
  29. 29.74 + ? = 100
  30. 30.61 + ? = 100
  31. 31.44 + ? = 100
  32. 32.39 + ? = 100
  33. 33.35 + ? = 100
  34. 34.83 + ? = 100
  35. 35.20 + ? = 100
  36. 36.79 + ? = 100
  37. 37.88 + ? = 100
  38. 38.16 + ? = 100
  39. 39.49 + ? = 100
  40. 40.82 + ? = 100

Answer key

  1. 83
  2. 1
  3. 6
  4. 20
  5. 3
  6. 33
  7. 76
  8. 77
  9. 15
  10. 50
  11. 62
  12. 4
  13. 30
  14. 9
  15. 22
  16. 2
  17. 59
  18. 75
  19. 68
  20. 64
  21. 67
  22. 29
  23. 72
  24. 5
  25. 78
  26. 7
  27. 47
  28. 8
  29. 26
  30. 39
  31. 56
  32. 61
  33. 65
  34. 17
  35. 80
  36. 21
  37. 12
  38. 84
  39. 51
  40. 18

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