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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 403 · 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 66 =
  2. 2.Half of 18 =
  3. 3.Double 33 =
  4. 4.Double 27 =
  5. 5.Half of 184 =
  6. 6.Double 56 =
  7. 7.Double 99 =
  8. 8.Double 42 =
  9. 9.Double 57 =
  10. 10.Double 22 =
  11. 11.Half of 76 =
  12. 12.Half of 32 =
  13. 13.Half of 186 =
  14. 14.Half of 82 =
  15. 15.Half of 162 =
  16. 16.Half of 96 =
  17. 17.Half of 62 =
  18. 18.Half of 34 =
  19. 19.Double 23 =
  20. 20.Half of 38 =
  21. 21.Double 89 =
  22. 22.Half of 42 =
  23. 23.Double 91 =
  24. 24.Half of 12 =
  25. 25.Half of 198 =
  26. 26.Double 77 =
  27. 27.Double 34 =
  28. 28.Half of 118 =
  29. 29.Half of 116 =
  30. 30.Double 12 =
  31. 31.Double 49 =
  32. 32.Half of 188 =
  33. 33.Half of 54 =
  34. 34.Double 45 =
  35. 35.Double 37 =
  36. 36.Double 21 =
  37. 37.Half of 52 =
  38. 38.Half of 64 =
  39. 39.Double 48 =
  40. 40.Half of 28 =

Answer key

  1. 33
  2. 9
  3. 66
  4. 54
  5. 92
  6. 112
  7. 198
  8. 84
  9. 114
  10. 44
  11. 38
  12. 16
  13. 93
  14. 41
  15. 81
  16. 48
  17. 31
  18. 17
  19. 46
  20. 19
  21. 178
  22. 21
  23. 182
  24. 6
  25. 99
  26. 154
  27. 68
  28. 59
  29. 58
  30. 24
  31. 98
  32. 94
  33. 27
  34. 90
  35. 74
  36. 42
  37. 26
  38. 32
  39. 96
  40. 14

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