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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 866 · 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. 1.71 + ? = 100
  2. 2.69 + ? = 100
  3. 3.12 + ? = 100
  4. 4.1 + ? = 10
  5. 5.72 + ? = 100
  6. 6.2 + ? = 10
  7. 7.8 + ? = 10
  8. 8.51 + ? = 100
  9. 9.4 + ? = 10
  10. 10.7 + ? = 10
  11. 11.9 + ? = 10
  12. 12.62 + ? = 100
  13. 13.24 + ? = 100
  14. 14.74 + ? = 100
  15. 15.46 + ? = 100
  16. 16.5 + ? = 10
  17. 17.61 + ? = 100
  18. 18.34 + ? = 100
  19. 19.58 + ? = 100
  20. 20.6 + ? = 10
  21. 21.28 + ? = 100
  22. 22.87 + ? = 100
  23. 23.75 + ? = 100
  24. 24.21 + ? = 100
  25. 25.29 + ? = 100
  26. 26.76 + ? = 100
  27. 27.89 + ? = 100
  28. 28.31 + ? = 100
  29. 29.15 + ? = 100
  30. 30.41 + ? = 100
  31. 31.38 + ? = 100
  32. 32.32 + ? = 100
  33. 33.57 + ? = 100
  34. 34.17 + ? = 100
  35. 35.64 + ? = 100
  36. 36.84 + ? = 100
  37. 37.54 + ? = 100
  38. 38.18 + ? = 100
  39. 39.35 + ? = 100
  40. 40.37 + ? = 100

Answer key

  1. 29
  2. 31
  3. 88
  4. 9
  5. 28
  6. 8
  7. 2
  8. 49
  9. 6
  10. 3
  11. 1
  12. 38
  13. 76
  14. 26
  15. 54
  16. 5
  17. 39
  18. 66
  19. 42
  20. 4
  21. 72
  22. 13
  23. 25
  24. 79
  25. 71
  26. 24
  27. 11
  28. 69
  29. 85
  30. 59
  31. 62
  32. 68
  33. 43
  34. 83
  35. 36
  36. 16
  37. 46
  38. 82
  39. 65
  40. 63

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