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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 794 · 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. 1.42 + ? = 100
  2. 2.39 + ? = 100
  3. 3.4 + ? = 10
  4. 4.6 + ? = 10
  5. 5.2 + ? = 10
  6. 6.87 + ? = 100
  7. 7.63 + ? = 100
  8. 8.55 + ? = 100
  9. 9.12 + ? = 100
  10. 10.71 + ? = 100
  11. 11.1 + ? = 10
  12. 12.64 + ? = 100
  13. 13.82 + ? = 100
  14. 14.8 + ? = 10
  15. 15.75 + ? = 100
  16. 16.31 + ? = 100
  17. 17.78 + ? = 100
  18. 18.72 + ? = 100
  19. 19.70 + ? = 100
  20. 20.68 + ? = 100
  21. 21.41 + ? = 100
  22. 22.61 + ? = 100
  23. 23.3 + ? = 10
  24. 24.25 + ? = 100
  25. 25.89 + ? = 100
  26. 26.21 + ? = 100
  27. 27.15 + ? = 100
  28. 28.65 + ? = 100
  29. 29.52 + ? = 100
  30. 30.24 + ? = 100
  31. 31.5 + ? = 10
  32. 32.79 + ? = 100
  33. 33.9 + ? = 10
  34. 34.66 + ? = 100
  35. 35.16 + ? = 100
  36. 36.30 + ? = 100
  37. 37.13 + ? = 100
  38. 38.32 + ? = 100
  39. 39.80 + ? = 100
  40. 40.54 + ? = 100

Answer key

  1. 58
  2. 61
  3. 6
  4. 4
  5. 8
  6. 13
  7. 37
  8. 45
  9. 88
  10. 29
  11. 9
  12. 36
  13. 18
  14. 2
  15. 25
  16. 69
  17. 22
  18. 28
  19. 30
  20. 32
  21. 59
  22. 39
  23. 7
  24. 75
  25. 11
  26. 79
  27. 85
  28. 35
  29. 48
  30. 76
  31. 5
  32. 21
  33. 1
  34. 34
  35. 84
  36. 70
  37. 87
  38. 68
  39. 20
  40. 46

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