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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 903 · 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. 1.23 + ? = 100
  2. 2.86 + ? = 100
  3. 3.4 + ? = 10
  4. 4.75 + ? = 100
  5. 5.3 + ? = 10
  6. 6.9 + ? = 10
  7. 7.15 + ? = 100
  8. 8.33 + ? = 100
  9. 9.81 + ? = 100
  10. 10.43 + ? = 100
  11. 11.5 + ? = 10
  12. 12.6 + ? = 10
  13. 13.1 + ? = 10
  14. 14.7 + ? = 10
  15. 15.84 + ? = 100
  16. 16.74 + ? = 100
  17. 17.41 + ? = 100
  18. 18.18 + ? = 100
  19. 19.20 + ? = 100
  20. 20.27 + ? = 100
  21. 21.70 + ? = 100
  22. 22.44 + ? = 100
  23. 23.38 + ? = 100
  24. 24.34 + ? = 100
  25. 25.57 + ? = 100
  26. 26.48 + ? = 100
  27. 27.8 + ? = 10
  28. 28.19 + ? = 100
  29. 29.31 + ? = 100
  30. 30.22 + ? = 100
  31. 31.82 + ? = 100
  32. 32.62 + ? = 100
  33. 33.2 + ? = 10
  34. 34.49 + ? = 100
  35. 35.45 + ? = 100
  36. 36.40 + ? = 100
  37. 37.42 + ? = 100
  38. 38.76 + ? = 100
  39. 39.89 + ? = 100
  40. 40.73 + ? = 100

Answer key

  1. 77
  2. 14
  3. 6
  4. 25
  5. 7
  6. 1
  7. 85
  8. 67
  9. 19
  10. 57
  11. 5
  12. 4
  13. 9
  14. 3
  15. 16
  16. 26
  17. 59
  18. 82
  19. 80
  20. 73
  21. 30
  22. 56
  23. 62
  24. 66
  25. 43
  26. 52
  27. 2
  28. 81
  29. 69
  30. 78
  31. 18
  32. 38
  33. 8
  34. 51
  35. 55
  36. 60
  37. 58
  38. 24
  39. 11
  40. 27

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