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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 387 · 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 34 =
  2. 2.Double 12 =
  3. 3.Double 96 =
  4. 4.Double 34 =
  5. 5.Double 76 =
  6. 6.Half of 132 =
  7. 7.Double 81 =
  8. 8.Double 18 =
  9. 9.Double 69 =
  10. 10.Half of 102 =
  11. 11.Double 86 =
  12. 12.Double 62 =
  13. 13.Double 54 =
  14. 14.Half of 78 =
  15. 15.Half of 82 =
  16. 16.Half of 58 =
  17. 17.Half of 68 =
  18. 18.Double 88 =
  19. 19.Double 66 =
  20. 20.Half of 54 =
  21. 21.Half of 158 =
  22. 22.Double 15 =
  23. 23.Half of 28 =
  24. 24.Double 31 =
  25. 25.Half of 114 =
  26. 26.Double 35 =
  27. 27.Double 59 =
  28. 28.Half of 72 =
  29. 29.Half of 124 =
  30. 30.Double 97 =
  31. 31.Half of 172 =
  32. 32.Double 71 =
  33. 33.Double 11 =
  34. 34.Double 49 =
  35. 35.Half of 74 =
  36. 36.Half of 42 =
  37. 37.Half of 154 =
  38. 38.Double 68 =
  39. 39.Half of 26 =
  40. 40.Double 83 =

Answer key

  1. 17
  2. 24
  3. 192
  4. 68
  5. 152
  6. 66
  7. 162
  8. 36
  9. 138
  10. 51
  11. 172
  12. 124
  13. 108
  14. 39
  15. 41
  16. 29
  17. 34
  18. 176
  19. 132
  20. 27
  21. 79
  22. 30
  23. 14
  24. 62
  25. 57
  26. 70
  27. 118
  28. 36
  29. 62
  30. 194
  31. 86
  32. 142
  33. 22
  34. 98
  35. 37
  36. 21
  37. 77
  38. 136
  39. 13
  40. 166

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