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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 793 · 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. 1.14 + ? = 100
  2. 2.29 + ? = 100
  3. 3.70 + ? = 100
  4. 4.85 + ? = 100
  5. 5.74 + ? = 100
  6. 6.20 + ? = 100
  7. 7.6 + ? = 10
  8. 8.36 + ? = 100
  9. 9.7 + ? = 10
  10. 10.82 + ? = 100
  11. 11.1 + ? = 10
  12. 12.43 + ? = 100
  13. 13.64 + ? = 100
  14. 14.5 + ? = 10
  15. 15.9 + ? = 10
  16. 16.2 + ? = 10
  17. 17.3 + ? = 10
  18. 18.15 + ? = 100
  19. 19.8 + ? = 10
  20. 20.31 + ? = 100
  21. 21.69 + ? = 100
  22. 22.58 + ? = 100
  23. 23.75 + ? = 100
  24. 24.89 + ? = 100
  25. 25.51 + ? = 100
  26. 26.66 + ? = 100
  27. 27.61 + ? = 100
  28. 28.17 + ? = 100
  29. 29.73 + ? = 100
  30. 30.79 + ? = 100
  31. 31.65 + ? = 100
  32. 32.30 + ? = 100
  33. 33.4 + ? = 10
  34. 34.34 + ? = 100
  35. 35.87 + ? = 100
  36. 36.57 + ? = 100
  37. 37.81 + ? = 100
  38. 38.47 + ? = 100
  39. 39.77 + ? = 100
  40. 40.62 + ? = 100

Answer key

  1. 86
  2. 71
  3. 30
  4. 15
  5. 26
  6. 80
  7. 4
  8. 64
  9. 3
  10. 18
  11. 9
  12. 57
  13. 36
  14. 5
  15. 1
  16. 8
  17. 7
  18. 85
  19. 2
  20. 69
  21. 31
  22. 42
  23. 25
  24. 11
  25. 49
  26. 34
  27. 39
  28. 83
  29. 27
  30. 21
  31. 35
  32. 70
  33. 6
  34. 66
  35. 13
  36. 43
  37. 19
  38. 53
  39. 23
  40. 38

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