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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 915 · 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. 3.32 + ? = 100
  4. 4.1 + ? = 10
  5. 5.9 + ? = 10
  6. 6.3 + ? = 10
  7. 7.8 + ? = 10
  8. 8.70 + ? = 100
  9. 9.22 + ? = 100
  10. 10.82 + ? = 100
  11. 11.7 + ? = 10
  12. 12.39 + ? = 100
  13. 13.59 + ? = 100
  14. 14.67 + ? = 100
  15. 15.6 + ? = 10
  16. 16.5 + ? = 10
  17. 17.24 + ? = 100
  18. 18.37 + ? = 100
  19. 19.26 + ? = 100
  20. 20.60 + ? = 100
  21. 21.4 + ? = 10
  22. 22.18 + ? = 100
  23. 23.19 + ? = 100
  24. 24.53 + ? = 100
  25. 25.66 + ? = 100
  26. 26.13 + ? = 100
  27. 27.51 + ? = 100
  28. 28.57 + ? = 100
  29. 29.17 + ? = 100
  30. 30.76 + ? = 100
  31. 31.74 + ? = 100
  32. 32.81 + ? = 100
  33. 33.47 + ? = 100
  34. 34.89 + ? = 100
  35. 35.83 + ? = 100
  36. 36.52 + ? = 100
  37. 37.71 + ? = 100
  38. 38.36 + ? = 100
  39. 39.34 + ? = 100
  40. 40.75 + ? = 100

Answer key

  1. 8
  2. 46
  3. 68
  4. 9
  5. 1
  6. 7
  7. 2
  8. 30
  9. 78
  10. 18
  11. 3
  12. 61
  13. 41
  14. 33
  15. 4
  16. 5
  17. 76
  18. 63
  19. 74
  20. 40
  21. 6
  22. 82
  23. 81
  24. 47
  25. 34
  26. 87
  27. 49
  28. 43
  29. 83
  30. 24
  31. 26
  32. 19
  33. 53
  34. 11
  35. 17
  36. 48
  37. 29
  38. 64
  39. 66
  40. 25

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