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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 756 · 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. 2.68 + ? = 100
  3. 3.3 + ? = 10
  4. 4.7 + ? = 10
  5. 5.45 + ? = 100
  6. 6.34 + ? = 100
  7. 7.88 + ? = 100
  8. 8.71 + ? = 100
  9. 9.67 + ? = 100
  10. 10.63 + ? = 100
  11. 11.1 + ? = 10
  12. 12.35 + ? = 100
  13. 13.5 + ? = 10
  14. 14.18 + ? = 100
  15. 15.89 + ? = 100
  16. 16.46 + ? = 100
  17. 17.59 + ? = 100
  18. 18.6 + ? = 10
  19. 19.28 + ? = 100
  20. 20.2 + ? = 10
  21. 21.69 + ? = 100
  22. 22.12 + ? = 100
  23. 23.20 + ? = 100
  24. 24.54 + ? = 100
  25. 25.66 + ? = 100
  26. 26.70 + ? = 100
  27. 27.9 + ? = 10
  28. 28.58 + ? = 100
  29. 29.4 + ? = 10
  30. 30.79 + ? = 100
  31. 31.78 + ? = 100
  32. 32.26 + ? = 100
  33. 33.73 + ? = 100
  34. 34.8 + ? = 10
  35. 35.57 + ? = 100
  36. 36.32 + ? = 100
  37. 37.31 + ? = 100
  38. 38.39 + ? = 100
  39. 39.62 + ? = 100
  40. 40.75 + ? = 100

Answer key

  1. 83
  2. 32
  3. 7
  4. 3
  5. 55
  6. 66
  7. 12
  8. 29
  9. 33
  10. 37
  11. 9
  12. 65
  13. 5
  14. 82
  15. 11
  16. 54
  17. 41
  18. 4
  19. 72
  20. 8
  21. 31
  22. 88
  23. 80
  24. 46
  25. 34
  26. 30
  27. 1
  28. 42
  29. 6
  30. 21
  31. 22
  32. 74
  33. 27
  34. 2
  35. 43
  36. 68
  37. 69
  38. 61
  39. 38
  40. 25

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