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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 973 · 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. 1.7 + ? = 10
  2. 2.84 + ? = 100
  3. 3.31 + ? = 100
  4. 4.27 + ? = 100
  5. 5.4 + ? = 10
  6. 6.3 + ? = 10
  7. 7.26 + ? = 100
  8. 8.1 + ? = 10
  9. 9.9 + ? = 10
  10. 10.69 + ? = 100
  11. 11.67 + ? = 100
  12. 12.81 + ? = 100
  13. 13.5 + ? = 10
  14. 14.59 + ? = 100
  15. 15.8 + ? = 10
  16. 16.2 + ? = 10
  17. 17.19 + ? = 100
  18. 18.71 + ? = 100
  19. 19.25 + ? = 100
  20. 20.79 + ? = 100
  21. 21.40 + ? = 100
  22. 22.6 + ? = 10
  23. 23.34 + ? = 100
  24. 24.86 + ? = 100
  25. 25.54 + ? = 100
  26. 26.38 + ? = 100
  27. 27.12 + ? = 100
  28. 28.33 + ? = 100
  29. 29.17 + ? = 100
  30. 30.61 + ? = 100
  31. 31.63 + ? = 100
  32. 32.58 + ? = 100
  33. 33.82 + ? = 100
  34. 34.85 + ? = 100
  35. 35.51 + ? = 100
  36. 36.77 + ? = 100
  37. 37.32 + ? = 100
  38. 38.66 + ? = 100
  39. 39.62 + ? = 100
  40. 40.47 + ? = 100

Answer key

  1. 3
  2. 16
  3. 69
  4. 73
  5. 6
  6. 7
  7. 74
  8. 9
  9. 1
  10. 31
  11. 33
  12. 19
  13. 5
  14. 41
  15. 2
  16. 8
  17. 81
  18. 29
  19. 75
  20. 21
  21. 60
  22. 4
  23. 66
  24. 14
  25. 46
  26. 62
  27. 88
  28. 67
  29. 83
  30. 39
  31. 37
  32. 42
  33. 18
  34. 15
  35. 49
  36. 23
  37. 68
  38. 34
  39. 38
  40. 53

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