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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 289 · 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 11 =
  2. 2.Double 21 =
  3. 3.Double 75 =
  4. 4.Half of 192 =
  5. 5.Half of 82 =
  6. 6.Double 49 =
  7. 7.Half of 198 =
  8. 8.Double 15 =
  9. 9.Double 48 =
  10. 10.Double 96 =
  11. 11.Double 16 =
  12. 12.Half of 194 =
  13. 13.Half of 124 =
  14. 14.Double 71 =
  15. 15.Double 38 =
  16. 16.Half of 142 =
  17. 17.Half of 16 =
  18. 18.Half of 34 =
  19. 19.Half of 72 =
  20. 20.Half of 162 =
  21. 21.Half of 86 =
  22. 22.Double 37 =
  23. 23.Double 99 =
  24. 24.Half of 128 =
  25. 25.Double 12 =
  26. 26.Half of 144 =
  27. 27.Double 41 =
  28. 28.Double 19 =
  29. 29.Half of 74 =
  30. 30.Half of 148 =
  31. 31.Half of 28 =
  32. 32.Double 34 =
  33. 33.Double 54 =
  34. 34.Half of 184 =
  35. 35.Half of 106 =
  36. 36.Half of 186 =
  37. 37.Half of 164 =
  38. 38.Double 29 =
  39. 39.Half of 188 =
  40. 40.Double 97 =

Answer key

  1. 22
  2. 42
  3. 150
  4. 96
  5. 41
  6. 98
  7. 99
  8. 30
  9. 96
  10. 192
  11. 32
  12. 97
  13. 62
  14. 142
  15. 76
  16. 71
  17. 8
  18. 17
  19. 36
  20. 81
  21. 43
  22. 74
  23. 198
  24. 64
  25. 24
  26. 72
  27. 82
  28. 38
  29. 37
  30. 74
  31. 14
  32. 68
  33. 108
  34. 92
  35. 53
  36. 93
  37. 82
  38. 58
  39. 94
  40. 194

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