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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 223 · 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 92 =
  2. 2.Half of 54 =
  3. 3.Half of 136 =
  4. 4.Double 28 =
  5. 5.Double 91 =
  6. 6.Double 45 =
  7. 7.Double 77 =
  8. 8.Half of 22 =
  9. 9.Double 56 =
  10. 10.Double 44 =
  11. 11.Double 79 =
  12. 12.Double 71 =
  13. 13.Half of 182 =
  14. 14.Half of 14 =
  15. 15.Double 75 =
  16. 16.Double 21 =
  17. 17.Half of 32 =
  18. 18.Double 61 =
  19. 19.Double 55 =
  20. 20.Half of 184 =
  21. 21.Double 51 =
  22. 22.Double 18 =
  23. 23.Double 38 =
  24. 24.Half of 36 =
  25. 25.Double 82 =
  26. 26.Double 42 =
  27. 27.Half of 122 =
  28. 28.Half of 58 =
  29. 29.Double 52 =
  30. 30.Half of 152 =
  31. 31.Half of 124 =
  32. 32.Half of 98 =
  33. 33.Half of 42 =
  34. 34.Half of 116 =
  35. 35.Half of 64 =
  36. 36.Double 86 =
  37. 37.Half of 88 =
  38. 38.Double 31 =
  39. 39.Half of 164 =
  40. 40.Double 78 =

Answer key

  1. 46
  2. 27
  3. 68
  4. 56
  5. 182
  6. 90
  7. 154
  8. 11
  9. 112
  10. 88
  11. 158
  12. 142
  13. 91
  14. 7
  15. 150
  16. 42
  17. 16
  18. 122
  19. 110
  20. 92
  21. 102
  22. 36
  23. 76
  24. 18
  25. 164
  26. 84
  27. 61
  28. 29
  29. 104
  30. 76
  31. 62
  32. 49
  33. 21
  34. 58
  35. 32
  36. 172
  37. 44
  38. 62
  39. 82
  40. 156

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