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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 411 · 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 162 =
  2. 2.Double 31 =
  3. 3.Half of 124 =
  4. 4.Double 94 =
  5. 5.Half of 14 =
  6. 6.Double 21 =
  7. 7.Half of 68 =
  8. 8.Double 89 =
  9. 9.Double 38 =
  10. 10.Double 22 =
  11. 11.Double 33 =
  12. 12.Half of 84 =
  13. 13.Double 54 =
  14. 14.Double 11 =
  15. 15.Half of 182 =
  16. 16.Double 32 =
  17. 17.Double 19 =
  18. 18.Half of 46 =
  19. 19.Double 41 =
  20. 20.Double 34 =
  21. 21.Double 61 =
  22. 22.Half of 192 =
  23. 23.Half of 134 =
  24. 24.Half of 138 =
  25. 25.Half of 82 =
  26. 26.Double 18 =
  27. 27.Half of 88 =
  28. 28.Double 98 =
  29. 29.Half of 74 =
  30. 30.Double 55 =
  31. 31.Half of 78 =
  32. 32.Half of 26 =
  33. 33.Half of 132 =
  34. 34.Half of 32 =
  35. 35.Half of 106 =
  36. 36.Double 57 =
  37. 37.Double 81 =
  38. 38.Double 49 =
  39. 39.Half of 146 =
  40. 40.Double 37 =

Answer key

  1. 81
  2. 62
  3. 62
  4. 188
  5. 7
  6. 42
  7. 34
  8. 178
  9. 76
  10. 44
  11. 66
  12. 42
  13. 108
  14. 22
  15. 91
  16. 64
  17. 38
  18. 23
  19. 82
  20. 68
  21. 122
  22. 96
  23. 67
  24. 69
  25. 41
  26. 36
  27. 44
  28. 196
  29. 37
  30. 110
  31. 39
  32. 13
  33. 66
  34. 16
  35. 53
  36. 114
  37. 162
  38. 98
  39. 73
  40. 74

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