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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 893 · 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. 1.2 + ? = 10
  2. 2.4 + ? = 10
  3. 3.7 + ? = 10
  4. 4.18 + ? = 100
  5. 5.58 + ? = 100
  6. 6.3 + ? = 10
  7. 7.71 + ? = 100
  8. 8.23 + ? = 100
  9. 9.1 + ? = 10
  10. 10.22 + ? = 100
  11. 11.6 + ? = 10
  12. 12.35 + ? = 100
  13. 13.9 + ? = 10
  14. 14.65 + ? = 100
  15. 15.29 + ? = 100
  16. 16.43 + ? = 100
  17. 17.57 + ? = 100
  18. 18.36 + ? = 100
  19. 19.8 + ? = 10
  20. 20.46 + ? = 100
  21. 21.32 + ? = 100
  22. 22.5 + ? = 10
  23. 23.60 + ? = 100
  24. 24.16 + ? = 100
  25. 25.70 + ? = 100
  26. 26.13 + ? = 100
  27. 27.21 + ? = 100
  28. 28.64 + ? = 100
  29. 29.63 + ? = 100
  30. 30.28 + ? = 100
  31. 31.42 + ? = 100
  32. 32.59 + ? = 100
  33. 33.81 + ? = 100
  34. 34.55 + ? = 100
  35. 35.11 + ? = 100
  36. 36.33 + ? = 100
  37. 37.31 + ? = 100
  38. 38.17 + ? = 100
  39. 39.41 + ? = 100
  40. 40.68 + ? = 100

Answer key

  1. 8
  2. 6
  3. 3
  4. 82
  5. 42
  6. 7
  7. 29
  8. 77
  9. 9
  10. 78
  11. 4
  12. 65
  13. 1
  14. 35
  15. 71
  16. 57
  17. 43
  18. 64
  19. 2
  20. 54
  21. 68
  22. 5
  23. 40
  24. 84
  25. 30
  26. 87
  27. 79
  28. 36
  29. 37
  30. 72
  31. 58
  32. 41
  33. 19
  34. 45
  35. 89
  36. 67
  37. 69
  38. 83
  39. 59
  40. 32

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