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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 730 · 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 14 =
  2. 2.Double 23 =
  3. 3.Half of 142 =
  4. 4.Double 13 =
  5. 5.Double 91 =
  6. 6.Double 35 =
  7. 7.Double 72 =
  8. 8.Half of 138 =
  9. 9.Double 96 =
  10. 10.Double 81 =
  11. 11.Half of 24 =
  12. 12.Double 83 =
  13. 13.Double 77 =
  14. 14.Half of 162 =
  15. 15.Half of 32 =
  16. 16.Half of 26 =
  17. 17.Half of 34 =
  18. 18.Double 47 =
  19. 19.Half of 112 =
  20. 20.Double 45 =
  21. 21.Double 18 =
  22. 22.Half of 192 =
  23. 23.Half of 46 =
  24. 24.Half of 132 =
  25. 25.Double 41 =
  26. 26.Double 51 =
  27. 27.Half of 68 =
  28. 28.Double 22 =
  29. 29.Half of 82 =
  30. 30.Half of 108 =
  31. 31.Half of 28 =
  32. 32.Half of 84 =
  33. 33.Double 75 =
  34. 34.Half of 148 =
  35. 35.Double 66 =
  36. 36.Double 27 =
  37. 37.Half of 92 =
  38. 38.Double 71 =
  39. 39.Double 82 =
  40. 40.Double 19 =

Answer key

  1. 28
  2. 46
  3. 71
  4. 26
  5. 182
  6. 70
  7. 144
  8. 69
  9. 192
  10. 162
  11. 12
  12. 166
  13. 154
  14. 81
  15. 16
  16. 13
  17. 17
  18. 94
  19. 56
  20. 90
  21. 36
  22. 96
  23. 23
  24. 66
  25. 82
  26. 102
  27. 34
  28. 44
  29. 41
  30. 54
  31. 14
  32. 42
  33. 150
  34. 74
  35. 132
  36. 54
  37. 46
  38. 142
  39. 164
  40. 38

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