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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 881 · 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. 1.82 + ? = 100
  2. 2.8 + ? = 10
  3. 3.32 + ? = 100
  4. 4.73 + ? = 100
  5. 5.28 + ? = 100
  6. 6.4 + ? = 10
  7. 7.13 + ? = 100
  8. 8.9 + ? = 10
  9. 9.1 + ? = 10
  10. 10.33 + ? = 100
  11. 11.78 + ? = 100
  12. 12.17 + ? = 100
  13. 13.5 + ? = 10
  14. 14.58 + ? = 100
  15. 15.65 + ? = 100
  16. 16.6 + ? = 10
  17. 17.68 + ? = 100
  18. 18.2 + ? = 10
  19. 19.60 + ? = 100
  20. 20.85 + ? = 100
  21. 21.37 + ? = 100
  22. 22.24 + ? = 100
  23. 23.31 + ? = 100
  24. 24.22 + ? = 100
  25. 25.76 + ? = 100
  26. 26.53 + ? = 100
  27. 27.11 + ? = 100
  28. 28.3 + ? = 10
  29. 29.14 + ? = 100
  30. 30.25 + ? = 100
  31. 31.57 + ? = 100
  32. 32.64 + ? = 100
  33. 33.27 + ? = 100
  34. 34.77 + ? = 100
  35. 35.19 + ? = 100
  36. 36.80 + ? = 100
  37. 37.38 + ? = 100
  38. 38.89 + ? = 100
  39. 39.35 + ? = 100
  40. 40.7 + ? = 10

Answer key

  1. 18
  2. 2
  3. 68
  4. 27
  5. 72
  6. 6
  7. 87
  8. 1
  9. 9
  10. 67
  11. 22
  12. 83
  13. 5
  14. 42
  15. 35
  16. 4
  17. 32
  18. 8
  19. 40
  20. 15
  21. 63
  22. 76
  23. 69
  24. 78
  25. 24
  26. 47
  27. 89
  28. 7
  29. 86
  30. 75
  31. 43
  32. 36
  33. 73
  34. 23
  35. 81
  36. 20
  37. 62
  38. 11
  39. 65
  40. 3

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