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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 729 · 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. 1.2 + ? = 10
  2. 2.54 + ? = 100
  3. 3.73 + ? = 100
  4. 4.53 + ? = 100
  5. 5.3 + ? = 10
  6. 6.27 + ? = 100
  7. 7.1 + ? = 10
  8. 8.32 + ? = 100
  9. 9.4 + ? = 10
  10. 10.28 + ? = 100
  11. 11.6 + ? = 10
  12. 12.9 + ? = 10
  13. 13.31 + ? = 100
  14. 14.23 + ? = 100
  15. 15.22 + ? = 100
  16. 16.5 + ? = 10
  17. 17.8 + ? = 10
  18. 18.33 + ? = 100
  19. 19.40 + ? = 100
  20. 20.78 + ? = 100
  21. 21.7 + ? = 10
  22. 22.69 + ? = 100
  23. 23.47 + ? = 100
  24. 24.20 + ? = 100
  25. 25.71 + ? = 100
  26. 26.18 + ? = 100
  27. 27.56 + ? = 100
  28. 28.82 + ? = 100
  29. 29.45 + ? = 100
  30. 30.60 + ? = 100
  31. 31.19 + ? = 100
  32. 32.65 + ? = 100
  33. 33.89 + ? = 100
  34. 34.24 + ? = 100
  35. 35.58 + ? = 100
  36. 36.42 + ? = 100
  37. 37.72 + ? = 100
  38. 38.80 + ? = 100
  39. 39.12 + ? = 100
  40. 40.13 + ? = 100

Answer key

  1. 8
  2. 46
  3. 27
  4. 47
  5. 7
  6. 73
  7. 9
  8. 68
  9. 6
  10. 72
  11. 4
  12. 1
  13. 69
  14. 77
  15. 78
  16. 5
  17. 2
  18. 67
  19. 60
  20. 22
  21. 3
  22. 31
  23. 53
  24. 80
  25. 29
  26. 82
  27. 44
  28. 18
  29. 55
  30. 40
  31. 81
  32. 35
  33. 11
  34. 76
  35. 42
  36. 58
  37. 28
  38. 20
  39. 88
  40. 87

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