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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 752 · 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. 1.7 + ? = 10
  2. 2.64 + ? = 100
  3. 3.2 + ? = 10
  4. 4.5 + ? = 10
  5. 5.51 + ? = 100
  6. 6.28 + ? = 100
  7. 7.25 + ? = 100
  8. 8.73 + ? = 100
  9. 9.47 + ? = 100
  10. 10.77 + ? = 100
  11. 11.61 + ? = 100
  12. 12.1 + ? = 10
  13. 13.67 + ? = 100
  14. 14.70 + ? = 100
  15. 15.21 + ? = 100
  16. 16.49 + ? = 100
  17. 17.17 + ? = 100
  18. 18.72 + ? = 100
  19. 19.68 + ? = 100
  20. 20.46 + ? = 100
  21. 21.8 + ? = 10
  22. 22.3 + ? = 10
  23. 23.4 + ? = 10
  24. 24.85 + ? = 100
  25. 25.52 + ? = 100
  26. 26.88 + ? = 100
  27. 27.19 + ? = 100
  28. 28.9 + ? = 10
  29. 29.78 + ? = 100
  30. 30.54 + ? = 100
  31. 31.63 + ? = 100
  32. 32.27 + ? = 100
  33. 33.32 + ? = 100
  34. 34.86 + ? = 100
  35. 35.39 + ? = 100
  36. 36.13 + ? = 100
  37. 37.89 + ? = 100
  38. 38.30 + ? = 100
  39. 39.75 + ? = 100
  40. 40.57 + ? = 100

Answer key

  1. 3
  2. 36
  3. 8
  4. 5
  5. 49
  6. 72
  7. 75
  8. 27
  9. 53
  10. 23
  11. 39
  12. 9
  13. 33
  14. 30
  15. 79
  16. 51
  17. 83
  18. 28
  19. 32
  20. 54
  21. 2
  22. 7
  23. 6
  24. 15
  25. 48
  26. 12
  27. 81
  28. 1
  29. 22
  30. 46
  31. 37
  32. 73
  33. 68
  34. 14
  35. 61
  36. 87
  37. 11
  38. 70
  39. 25
  40. 43

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