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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 937 · 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. 1.29 + ? = 100
  2. 2.28 + ? = 100
  3. 3.6 + ? = 10
  4. 4.3 + ? = 10
  5. 5.30 + ? = 100
  6. 6.58 + ? = 100
  7. 7.7 + ? = 10
  8. 8.4 + ? = 10
  9. 9.5 + ? = 10
  10. 10.32 + ? = 100
  11. 11.52 + ? = 100
  12. 12.76 + ? = 100
  13. 13.8 + ? = 10
  14. 14.12 + ? = 100
  15. 15.16 + ? = 100
  16. 16.75 + ? = 100
  17. 17.18 + ? = 100
  18. 18.81 + ? = 100
  19. 19.89 + ? = 100
  20. 20.87 + ? = 100
  21. 21.23 + ? = 100
  22. 22.68 + ? = 100
  23. 23.25 + ? = 100
  24. 24.9 + ? = 10
  25. 25.1 + ? = 10
  26. 26.2 + ? = 10
  27. 27.64 + ? = 100
  28. 28.31 + ? = 100
  29. 29.11 + ? = 100
  30. 30.79 + ? = 100
  31. 31.56 + ? = 100
  32. 32.43 + ? = 100
  33. 33.71 + ? = 100
  34. 34.42 + ? = 100
  35. 35.63 + ? = 100
  36. 36.17 + ? = 100
  37. 37.46 + ? = 100
  38. 38.88 + ? = 100
  39. 39.51 + ? = 100
  40. 40.84 + ? = 100

Answer key

  1. 71
  2. 72
  3. 4
  4. 7
  5. 70
  6. 42
  7. 3
  8. 6
  9. 5
  10. 68
  11. 48
  12. 24
  13. 2
  14. 88
  15. 84
  16. 25
  17. 82
  18. 19
  19. 11
  20. 13
  21. 77
  22. 32
  23. 75
  24. 1
  25. 9
  26. 8
  27. 36
  28. 69
  29. 89
  30. 21
  31. 44
  32. 57
  33. 29
  34. 58
  35. 37
  36. 83
  37. 54
  38. 12
  39. 49
  40. 16

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