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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 807 · 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. 1.9 + ? = 10
  2. 2.64 + ? = 100
  3. 3.18 + ? = 100
  4. 4.43 + ? = 100
  5. 5.3 + ? = 10
  6. 6.35 + ? = 100
  7. 7.86 + ? = 100
  8. 8.16 + ? = 100
  9. 9.6 + ? = 10
  10. 10.71 + ? = 100
  11. 11.27 + ? = 100
  12. 12.81 + ? = 100
  13. 13.73 + ? = 100
  14. 14.5 + ? = 10
  15. 15.7 + ? = 10
  16. 16.20 + ? = 100
  17. 17.4 + ? = 10
  18. 18.38 + ? = 100
  19. 19.79 + ? = 100
  20. 20.68 + ? = 100
  21. 21.8 + ? = 10
  22. 22.11 + ? = 100
  23. 23.54 + ? = 100
  24. 24.17 + ? = 100
  25. 25.45 + ? = 100
  26. 26.59 + ? = 100
  27. 27.2 + ? = 10
  28. 28.1 + ? = 10
  29. 29.85 + ? = 100
  30. 30.22 + ? = 100
  31. 31.41 + ? = 100
  32. 32.31 + ? = 100
  33. 33.75 + ? = 100
  34. 34.65 + ? = 100
  35. 35.78 + ? = 100
  36. 36.28 + ? = 100
  37. 37.29 + ? = 100
  38. 38.70 + ? = 100
  39. 39.77 + ? = 100
  40. 40.56 + ? = 100

Answer key

  1. 1
  2. 36
  3. 82
  4. 57
  5. 7
  6. 65
  7. 14
  8. 84
  9. 4
  10. 29
  11. 73
  12. 19
  13. 27
  14. 5
  15. 3
  16. 80
  17. 6
  18. 62
  19. 21
  20. 32
  21. 2
  22. 89
  23. 46
  24. 83
  25. 55
  26. 41
  27. 8
  28. 9
  29. 15
  30. 78
  31. 59
  32. 69
  33. 25
  34. 35
  35. 22
  36. 72
  37. 71
  38. 30
  39. 23
  40. 44

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