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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 945 · 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. 2.70 + ? = 100
  3. 3.7 + ? = 10
  4. 4.8 + ? = 10
  5. 5.19 + ? = 100
  6. 6.14 + ? = 100
  7. 7.84 + ? = 100
  8. 8.86 + ? = 100
  9. 9.66 + ? = 100
  10. 10.9 + ? = 10
  11. 11.65 + ? = 100
  12. 12.4 + ? = 10
  13. 13.28 + ? = 100
  14. 14.53 + ? = 100
  15. 15.6 + ? = 10
  16. 16.63 + ? = 100
  17. 17.29 + ? = 100
  18. 18.59 + ? = 100
  19. 19.89 + ? = 100
  20. 20.60 + ? = 100
  21. 21.43 + ? = 100
  22. 22.21 + ? = 100
  23. 23.3 + ? = 10
  24. 24.2 + ? = 10
  25. 25.44 + ? = 100
  26. 26.39 + ? = 100
  27. 27.54 + ? = 100
  28. 28.17 + ? = 100
  29. 29.15 + ? = 100
  30. 30.33 + ? = 100
  31. 31.16 + ? = 100
  32. 32.67 + ? = 100
  33. 33.46 + ? = 100
  34. 34.58 + ? = 100
  35. 35.5 + ? = 10
  36. 36.38 + ? = 100
  37. 37.22 + ? = 100
  38. 38.49 + ? = 100
  39. 39.31 + ? = 100
  40. 40.48 + ? = 100

Answer key

  1. 77
  2. 30
  3. 3
  4. 2
  5. 81
  6. 86
  7. 16
  8. 14
  9. 34
  10. 1
  11. 35
  12. 6
  13. 72
  14. 47
  15. 4
  16. 37
  17. 71
  18. 41
  19. 11
  20. 40
  21. 57
  22. 79
  23. 7
  24. 8
  25. 56
  26. 61
  27. 46
  28. 83
  29. 85
  30. 67
  31. 84
  32. 33
  33. 54
  34. 42
  35. 5
  36. 62
  37. 78
  38. 51
  39. 69
  40. 52

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