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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 700 · 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 32 =
  2. 2.Double 51 =
  3. 3.Half of 12 =
  4. 4.Double 81 =
  5. 5.Double 31 =
  6. 6.Double 74 =
  7. 7.Double 33 =
  8. 8.Half of 106 =
  9. 9.Half of 172 =
  10. 10.Double 61 =
  11. 11.Half of 34 =
  12. 12.Double 71 =
  13. 13.Double 36 =
  14. 14.Double 39 =
  15. 15.Double 93 =
  16. 16.Double 11 =
  17. 17.Double 25 =
  18. 18.Half of 66 =
  19. 19.Half of 82 =
  20. 20.Double 86 =
  21. 21.Double 68 =
  22. 22.Double 64 =
  23. 23.Double 27 =
  24. 24.Double 83 =
  25. 25.Double 69 =
  26. 26.Double 77 =
  27. 27.Half of 192 =
  28. 28.Double 78 =
  29. 29.Double 94 =
  30. 30.Half of 132 =
  31. 31.Double 38 =
  32. 32.Double 82 =
  33. 33.Double 53 =
  34. 34.Double 23 =
  35. 35.Half of 128 =
  36. 36.Half of 16 =
  37. 37.Half of 64 =
  38. 38.Double 26 =
  39. 39.Half of 146 =
  40. 40.Double 84 =

Answer key

  1. 64
  2. 102
  3. 6
  4. 162
  5. 62
  6. 148
  7. 66
  8. 53
  9. 86
  10. 122
  11. 17
  12. 142
  13. 72
  14. 78
  15. 186
  16. 22
  17. 50
  18. 33
  19. 41
  20. 172
  21. 136
  22. 128
  23. 54
  24. 166
  25. 138
  26. 154
  27. 96
  28. 156
  29. 188
  30. 66
  31. 76
  32. 164
  33. 106
  34. 46
  35. 64
  36. 8
  37. 32
  38. 52
  39. 73
  40. 168

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