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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 723 · 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. 1.3 + ? = 10
  2. 2.48 + ? = 100
  3. 3.30 + ? = 100
  4. 4.38 + ? = 100
  5. 5.6 + ? = 10
  6. 6.24 + ? = 100
  7. 7.33 + ? = 100
  8. 8.7 + ? = 10
  9. 9.37 + ? = 100
  10. 10.4 + ? = 10
  11. 11.51 + ? = 100
  12. 12.22 + ? = 100
  13. 13.1 + ? = 10
  14. 14.49 + ? = 100
  15. 15.57 + ? = 100
  16. 16.89 + ? = 100
  17. 17.36 + ? = 100
  18. 18.86 + ? = 100
  19. 19.34 + ? = 100
  20. 20.2 + ? = 10
  21. 21.65 + ? = 100
  22. 22.84 + ? = 100
  23. 23.45 + ? = 100
  24. 24.32 + ? = 100
  25. 25.9 + ? = 10
  26. 26.17 + ? = 100
  27. 27.23 + ? = 100
  28. 28.8 + ? = 10
  29. 29.73 + ? = 100
  30. 30.19 + ? = 100
  31. 31.5 + ? = 10
  32. 32.53 + ? = 100
  33. 33.66 + ? = 100
  34. 34.75 + ? = 100
  35. 35.78 + ? = 100
  36. 36.14 + ? = 100
  37. 37.44 + ? = 100
  38. 38.27 + ? = 100
  39. 39.26 + ? = 100
  40. 40.71 + ? = 100

Answer key

  1. 7
  2. 52
  3. 70
  4. 62
  5. 4
  6. 76
  7. 67
  8. 3
  9. 63
  10. 6
  11. 49
  12. 78
  13. 9
  14. 51
  15. 43
  16. 11
  17. 64
  18. 14
  19. 66
  20. 8
  21. 35
  22. 16
  23. 55
  24. 68
  25. 1
  26. 83
  27. 77
  28. 2
  29. 27
  30. 81
  31. 5
  32. 47
  33. 34
  34. 25
  35. 22
  36. 86
  37. 56
  38. 73
  39. 74
  40. 29

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