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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 963 · 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. 1.5 + ? = 10
  2. 2.55 + ? = 100
  3. 3.8 + ? = 10
  4. 4.3 + ? = 10
  5. 5.57 + ? = 100
  6. 6.66 + ? = 100
  7. 7.7 + ? = 10
  8. 8.9 + ? = 10
  9. 9.77 + ? = 100
  10. 10.15 + ? = 100
  11. 11.53 + ? = 100
  12. 12.18 + ? = 100
  13. 13.6 + ? = 10
  14. 14.25 + ? = 100
  15. 15.47 + ? = 100
  16. 16.37 + ? = 100
  17. 17.41 + ? = 100
  18. 18.32 + ? = 100
  19. 19.74 + ? = 100
  20. 20.51 + ? = 100
  21. 21.82 + ? = 100
  22. 22.30 + ? = 100
  23. 23.70 + ? = 100
  24. 24.58 + ? = 100
  25. 25.31 + ? = 100
  26. 26.4 + ? = 10
  27. 27.2 + ? = 10
  28. 28.22 + ? = 100
  29. 29.56 + ? = 100
  30. 30.36 + ? = 100
  31. 31.59 + ? = 100
  32. 32.64 + ? = 100
  33. 33.76 + ? = 100
  34. 34.71 + ? = 100
  35. 35.1 + ? = 10
  36. 36.28 + ? = 100
  37. 37.39 + ? = 100
  38. 38.83 + ? = 100
  39. 39.87 + ? = 100
  40. 40.60 + ? = 100

Answer key

  1. 5
  2. 45
  3. 2
  4. 7
  5. 43
  6. 34
  7. 3
  8. 1
  9. 23
  10. 85
  11. 47
  12. 82
  13. 4
  14. 75
  15. 53
  16. 63
  17. 59
  18. 68
  19. 26
  20. 49
  21. 18
  22. 70
  23. 30
  24. 42
  25. 69
  26. 6
  27. 8
  28. 78
  29. 44
  30. 64
  31. 41
  32. 36
  33. 24
  34. 29
  35. 9
  36. 72
  37. 61
  38. 17
  39. 13
  40. 40

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