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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 812 · 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. 1.49 + ? = 100
  2. 2.24 + ? = 100
  3. 3.63 + ? = 100
  4. 4.1 + ? = 10
  5. 5.28 + ? = 100
  6. 6.62 + ? = 100
  7. 7.43 + ? = 100
  8. 8.14 + ? = 100
  9. 9.3 + ? = 10
  10. 10.5 + ? = 10
  11. 11.71 + ? = 100
  12. 12.60 + ? = 100
  13. 13.6 + ? = 10
  14. 14.13 + ? = 100
  15. 15.38 + ? = 100
  16. 16.2 + ? = 10
  17. 17.35 + ? = 100
  18. 18.7 + ? = 10
  19. 19.8 + ? = 10
  20. 20.4 + ? = 10
  21. 21.74 + ? = 100
  22. 22.9 + ? = 10
  23. 23.54 + ? = 100
  24. 24.32 + ? = 100
  25. 25.68 + ? = 100
  26. 26.72 + ? = 100
  27. 27.73 + ? = 100
  28. 28.47 + ? = 100
  29. 29.19 + ? = 100
  30. 30.42 + ? = 100
  31. 31.55 + ? = 100
  32. 32.15 + ? = 100
  33. 33.20 + ? = 100
  34. 34.46 + ? = 100
  35. 35.16 + ? = 100
  36. 36.18 + ? = 100
  37. 37.66 + ? = 100
  38. 38.48 + ? = 100
  39. 39.84 + ? = 100
  40. 40.11 + ? = 100

Answer key

  1. 51
  2. 76
  3. 37
  4. 9
  5. 72
  6. 38
  7. 57
  8. 86
  9. 7
  10. 5
  11. 29
  12. 40
  13. 4
  14. 87
  15. 62
  16. 8
  17. 65
  18. 3
  19. 2
  20. 6
  21. 26
  22. 1
  23. 46
  24. 68
  25. 32
  26. 28
  27. 27
  28. 53
  29. 81
  30. 58
  31. 45
  32. 85
  33. 80
  34. 54
  35. 84
  36. 82
  37. 34
  38. 52
  39. 16
  40. 89

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