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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 450 · 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 34 =
  2. 2.Half of 28 =
  3. 3.Double 68 =
  4. 4.Half of 36 =
  5. 5.Half of 92 =
  6. 6.Half of 78 =
  7. 7.Double 92 =
  8. 8.Half of 82 =
  9. 9.Half of 86 =
  10. 10.Double 32 =
  11. 11.Half of 164 =
  12. 12.Double 71 =
  13. 13.Double 58 =
  14. 14.Half of 64 =
  15. 15.Half of 174 =
  16. 16.Double 51 =
  17. 17.Half of 172 =
  18. 18.Double 73 =
  19. 19.Half of 162 =
  20. 20.Double 41 =
  21. 21.Half of 188 =
  22. 22.Half of 166 =
  23. 23.Half of 16 =
  24. 24.Double 47 =
  25. 25.Half of 192 =
  26. 26.Half of 34 =
  27. 27.Double 31 =
  28. 28.Half of 58 =
  29. 29.Double 86 =
  30. 30.Half of 178 =
  31. 31.Double 95 =
  32. 32.Double 94 =
  33. 33.Double 61 =
  34. 34.Half of 54 =
  35. 35.Half of 14 =
  36. 36.Half of 94 =
  37. 37.Double 72 =
  38. 38.Double 91 =
  39. 39.Half of 22 =
  40. 40.Half of 84 =

Answer key

  1. 68
  2. 14
  3. 136
  4. 18
  5. 46
  6. 39
  7. 184
  8. 41
  9. 43
  10. 64
  11. 82
  12. 142
  13. 116
  14. 32
  15. 87
  16. 102
  17. 86
  18. 146
  19. 81
  20. 82
  21. 94
  22. 83
  23. 8
  24. 94
  25. 96
  26. 17
  27. 62
  28. 29
  29. 172
  30. 89
  31. 190
  32. 188
  33. 122
  34. 27
  35. 7
  36. 47
  37. 144
  38. 182
  39. 11
  40. 42

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