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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 867 · 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. 1.33 + ? = 100
  2. 2.25 + ? = 100
  3. 3.11 + ? = 100
  4. 4.6 + ? = 10
  5. 5.21 + ? = 100
  6. 6.41 + ? = 100
  7. 7.37 + ? = 100
  8. 8.81 + ? = 100
  9. 9.22 + ? = 100
  10. 10.60 + ? = 100
  11. 11.71 + ? = 100
  12. 12.9 + ? = 10
  13. 13.66 + ? = 100
  14. 14.2 + ? = 10
  15. 15.44 + ? = 100
  16. 16.1 + ? = 10
  17. 17.4 + ? = 10
  18. 18.28 + ? = 100
  19. 19.63 + ? = 100
  20. 20.8 + ? = 10
  21. 21.27 + ? = 100
  22. 22.18 + ? = 100
  23. 23.39 + ? = 100
  24. 24.14 + ? = 100
  25. 25.7 + ? = 10
  26. 26.29 + ? = 100
  27. 27.47 + ? = 100
  28. 28.62 + ? = 100
  29. 29.5 + ? = 10
  30. 30.67 + ? = 100
  31. 31.23 + ? = 100
  32. 32.72 + ? = 100
  33. 33.17 + ? = 100
  34. 34.3 + ? = 10
  35. 35.13 + ? = 100
  36. 36.70 + ? = 100
  37. 37.77 + ? = 100
  38. 38.42 + ? = 100
  39. 39.36 + ? = 100
  40. 40.15 + ? = 100

Answer key

  1. 67
  2. 75
  3. 89
  4. 4
  5. 79
  6. 59
  7. 63
  8. 19
  9. 78
  10. 40
  11. 29
  12. 1
  13. 34
  14. 8
  15. 56
  16. 9
  17. 6
  18. 72
  19. 37
  20. 2
  21. 73
  22. 82
  23. 61
  24. 86
  25. 3
  26. 71
  27. 53
  28. 38
  29. 5
  30. 33
  31. 77
  32. 28
  33. 83
  34. 7
  35. 87
  36. 30
  37. 23
  38. 58
  39. 64
  40. 85

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