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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 83 · 40 questions
TalentJR

The trick (Split and double): Split the number into tens and ones: 37 = 30 + 7. Double each part (30 → 60, 7 → 14) — or halve each part. Add the two answers: 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.Half of 42 =
  2. 2.Half of 84 =
  3. 3.Double 83 =
  4. 4.Double 13 =
  5. 5.Double 61 =
  6. 6.Half of 22 =
  7. 7.Double 39 =
  8. 8.Double 33 =
  9. 9.Double 49 =
  10. 10.Half of 32 =
  11. 11.Half of 142 =
  12. 12.Double 21 =
  13. 13.Half of 184 =
  14. 14.Half of 132 =
  15. 15.Double 71 =
  16. 16.Half of 146 =
  17. 17.Half of 194 =
  18. 18.Double 79 =
  19. 19.Double 31 =
  20. 20.Half of 54 =
  21. 21.Double 67 =
  22. 22.Half of 172 =
  23. 23.Double 89 =
  24. 24.Double 24 =
  25. 25.Half of 76 =
  26. 26.Half of 82 =
  27. 27.Half of 18 =
  28. 28.Half of 66 =
  29. 29.Double 56 =
  30. 30.Half of 122 =
  31. 31.Half of 162 =
  32. 32.Double 91 =
  33. 33.Half of 174 =
  34. 34.Half of 128 =
  35. 35.Double 57 =
  36. 36.Double 68 =
  37. 37.Double 36 =
  38. 38.Double 81 =
  39. 39.Double 96 =
  40. 40.Half of 136 =

Answer key

  1. 21
  2. 42
  3. 166
  4. 26
  5. 122
  6. 11
  7. 78
  8. 66
  9. 98
  10. 16
  11. 71
  12. 42
  13. 92
  14. 66
  15. 142
  16. 73
  17. 97
  18. 158
  19. 62
  20. 27
  21. 134
  22. 86
  23. 178
  24. 48
  25. 38
  26. 41
  27. 9
  28. 33
  29. 112
  30. 61
  31. 81
  32. 182
  33. 87
  34. 64
  35. 114
  36. 136
  37. 72
  38. 162
  39. 192
  40. 68

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