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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 787 · 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. 1.41 + ? = 100
  2. 2.26 + ? = 100
  3. 3.67 + ? = 100
  4. 4.4 + ? = 10
  5. 5.1 + ? = 10
  6. 6.24 + ? = 100
  7. 7.20 + ? = 100
  8. 8.8 + ? = 10
  9. 9.66 + ? = 100
  10. 10.19 + ? = 100
  11. 11.36 + ? = 100
  12. 12.81 + ? = 100
  13. 13.29 + ? = 100
  14. 14.2 + ? = 10
  15. 15.5 + ? = 10
  16. 16.55 + ? = 100
  17. 17.7 + ? = 10
  18. 18.40 + ? = 100
  19. 19.27 + ? = 100
  20. 20.89 + ? = 100
  21. 21.60 + ? = 100
  22. 22.83 + ? = 100
  23. 23.78 + ? = 100
  24. 24.14 + ? = 100
  25. 25.3 + ? = 10
  26. 26.32 + ? = 100
  27. 27.28 + ? = 100
  28. 28.9 + ? = 10
  29. 29.6 + ? = 10
  30. 30.69 + ? = 100
  31. 31.61 + ? = 100
  32. 32.18 + ? = 100
  33. 33.17 + ? = 100
  34. 34.42 + ? = 100
  35. 35.53 + ? = 100
  36. 36.35 + ? = 100
  37. 37.44 + ? = 100
  38. 38.71 + ? = 100
  39. 39.22 + ? = 100
  40. 40.49 + ? = 100

Answer key

  1. 59
  2. 74
  3. 33
  4. 6
  5. 9
  6. 76
  7. 80
  8. 2
  9. 34
  10. 81
  11. 64
  12. 19
  13. 71
  14. 8
  15. 5
  16. 45
  17. 3
  18. 60
  19. 73
  20. 11
  21. 40
  22. 17
  23. 22
  24. 86
  25. 7
  26. 68
  27. 72
  28. 1
  29. 4
  30. 31
  31. 39
  32. 82
  33. 83
  34. 58
  35. 47
  36. 65
  37. 56
  38. 29
  39. 78
  40. 51

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