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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 750 · 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. 1.1 + ? = 10
  2. 2.22 + ? = 100
  3. 3.42 + ? = 100
  4. 4.2 + ? = 10
  5. 5.5 + ? = 10
  6. 6.27 + ? = 100
  7. 7.17 + ? = 100
  8. 8.9 + ? = 10
  9. 9.38 + ? = 100
  10. 10.67 + ? = 100
  11. 11.32 + ? = 100
  12. 12.36 + ? = 100
  13. 13.86 + ? = 100
  14. 14.7 + ? = 10
  15. 15.62 + ? = 100
  16. 16.64 + ? = 100
  17. 17.52 + ? = 100
  18. 18.3 + ? = 10
  19. 19.51 + ? = 100
  20. 20.21 + ? = 100
  21. 21.4 + ? = 10
  22. 22.8 + ? = 10
  23. 23.40 + ? = 100
  24. 24.26 + ? = 100
  25. 25.71 + ? = 100
  26. 26.39 + ? = 100
  27. 27.70 + ? = 100
  28. 28.15 + ? = 100
  29. 29.48 + ? = 100
  30. 30.13 + ? = 100
  31. 31.16 + ? = 100
  32. 32.55 + ? = 100
  33. 33.84 + ? = 100
  34. 34.43 + ? = 100
  35. 35.19 + ? = 100
  36. 36.24 + ? = 100
  37. 37.85 + ? = 100
  38. 38.79 + ? = 100
  39. 39.37 + ? = 100
  40. 40.56 + ? = 100

Answer key

  1. 9
  2. 78
  3. 58
  4. 8
  5. 5
  6. 73
  7. 83
  8. 1
  9. 62
  10. 33
  11. 68
  12. 64
  13. 14
  14. 3
  15. 38
  16. 36
  17. 48
  18. 7
  19. 49
  20. 79
  21. 6
  22. 2
  23. 60
  24. 74
  25. 29
  26. 61
  27. 30
  28. 85
  29. 52
  30. 87
  31. 84
  32. 45
  33. 16
  34. 57
  35. 81
  36. 76
  37. 15
  38. 21
  39. 63
  40. 44

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