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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 800 · 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 86 =
  2. 2.Double 99 =
  3. 3.Double 82 =
  4. 4.Double 81 =
  5. 5.Half of 92 =
  6. 6.Double 18 =
  7. 7.Half of 166 =
  8. 8.Double 68 =
  9. 9.Half of 172 =
  10. 10.Double 94 =
  11. 11.Half of 194 =
  12. 12.Double 54 =
  13. 13.Double 14 =
  14. 14.Double 92 =
  15. 15.Half of 182 =
  16. 16.Half of 164 =
  17. 17.Half of 76 =
  18. 18.Double 48 =
  19. 19.Double 19 =
  20. 20.Double 12 =
  21. 21.Half of 22 =
  22. 22.Half of 46 =
  23. 23.Half of 196 =
  24. 24.Double 49 =
  25. 25.Double 67 =
  26. 26.Half of 184 =
  27. 27.Half of 28 =
  28. 28.Half of 42 =
  29. 29.Double 28 =
  30. 30.Half of 188 =
  31. 31.Half of 144 =
  32. 32.Half of 128 =
  33. 33.Half of 146 =
  34. 34.Double 17 =
  35. 35.Double 79 =
  36. 36.Double 41 =
  37. 37.Half of 94 =
  38. 38.Half of 56 =
  39. 39.Double 51 =
  40. 40.Double 39 =

Answer key

  1. 172
  2. 198
  3. 164
  4. 162
  5. 46
  6. 36
  7. 83
  8. 136
  9. 86
  10. 188
  11. 97
  12. 108
  13. 28
  14. 184
  15. 91
  16. 82
  17. 38
  18. 96
  19. 38
  20. 24
  21. 11
  22. 23
  23. 98
  24. 98
  25. 134
  26. 92
  27. 14
  28. 21
  29. 56
  30. 94
  31. 72
  32. 64
  33. 73
  34. 34
  35. 158
  36. 82
  37. 47
  38. 28
  39. 102
  40. 78

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