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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 612 · 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.Double 14 =
  2. 2.Double 25 =
  3. 3.Half of 146 =
  4. 4.Half of 54 =
  5. 5.Double 76 =
  6. 6.Double 71 =
  7. 7.Half of 122 =
  8. 8.Half of 58 =
  9. 9.Double 99 =
  10. 10.Half of 134 =
  11. 11.Double 48 =
  12. 12.Double 58 =
  13. 13.Half of 132 =
  14. 14.Double 74 =
  15. 15.Double 81 =
  16. 16.Half of 12 =
  17. 17.Double 41 =
  18. 18.Half of 34 =
  19. 19.Double 42 =
  20. 20.Double 88 =
  21. 21.Half of 66 =
  22. 22.Double 52 =
  23. 23.Half of 42 =
  24. 24.Double 61 =
  25. 25.Double 96 =
  26. 26.Double 49 =
  27. 27.Double 17 =
  28. 28.Half of 114 =
  29. 29.Half of 92 =
  30. 30.Half of 158 =
  31. 31.Half of 128 =
  32. 32.Double 43 =
  33. 33.Double 94 =
  34. 34.Half of 182 =
  35. 35.Double 44 =
  36. 36.Half of 96 =
  37. 37.Double 31 =
  38. 38.Half of 38 =
  39. 39.Half of 22 =
  40. 40.Half of 26 =

Answer key

  1. 28
  2. 50
  3. 73
  4. 27
  5. 152
  6. 142
  7. 61
  8. 29
  9. 198
  10. 67
  11. 96
  12. 116
  13. 66
  14. 148
  15. 162
  16. 6
  17. 82
  18. 17
  19. 84
  20. 176
  21. 33
  22. 104
  23. 21
  24. 122
  25. 192
  26. 98
  27. 34
  28. 57
  29. 46
  30. 79
  31. 64
  32. 86
  33. 188
  34. 91
  35. 88
  36. 48
  37. 62
  38. 19
  39. 11
  40. 13

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