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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 859 · 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. 1.65 + ? = 100
  2. 2.59 + ? = 100
  3. 3.78 + ? = 100
  4. 4.66 + ? = 100
  5. 5.46 + ? = 100
  6. 6.4 + ? = 10
  7. 7.74 + ? = 100
  8. 8.3 + ? = 10
  9. 9.9 + ? = 10
  10. 10.19 + ? = 100
  11. 11.70 + ? = 100
  12. 12.15 + ? = 100
  13. 13.25 + ? = 100
  14. 14.56 + ? = 100
  15. 15.7 + ? = 10
  16. 16.54 + ? = 100
  17. 17.5 + ? = 10
  18. 18.67 + ? = 100
  19. 19.52 + ? = 100
  20. 20.8 + ? = 10
  21. 21.42 + ? = 100
  22. 22.38 + ? = 100
  23. 23.32 + ? = 100
  24. 24.40 + ? = 100
  25. 25.77 + ? = 100
  26. 26.2 + ? = 10
  27. 27.82 + ? = 100
  28. 28.12 + ? = 100
  29. 29.24 + ? = 100
  30. 30.6 + ? = 10
  31. 31.55 + ? = 100
  32. 32.14 + ? = 100
  33. 33.17 + ? = 100
  34. 34.1 + ? = 10
  35. 35.28 + ? = 100
  36. 36.64 + ? = 100
  37. 37.13 + ? = 100
  38. 38.18 + ? = 100
  39. 39.83 + ? = 100
  40. 40.84 + ? = 100

Answer key

  1. 35
  2. 41
  3. 22
  4. 34
  5. 54
  6. 6
  7. 26
  8. 7
  9. 1
  10. 81
  11. 30
  12. 85
  13. 75
  14. 44
  15. 3
  16. 46
  17. 5
  18. 33
  19. 48
  20. 2
  21. 58
  22. 62
  23. 68
  24. 60
  25. 23
  26. 8
  27. 18
  28. 88
  29. 76
  30. 4
  31. 45
  32. 86
  33. 83
  34. 9
  35. 72
  36. 36
  37. 87
  38. 82
  39. 17
  40. 16

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