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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 723 · 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 85 =
  2. 2.Double 72 =
  3. 3.Half of 74 =
  4. 4.Half of 14 =
  5. 5.Half of 146 =
  6. 6.Half of 22 =
  7. 7.Double 99 =
  8. 8.Double 17 =
  9. 9.Double 75 =
  10. 10.Double 91 =
  11. 11.Double 61 =
  12. 12.Half of 94 =
  13. 13.Half of 66 =
  14. 14.Double 65 =
  15. 15.Half of 34 =
  16. 16.Half of 86 =
  17. 17.Half of 164 =
  18. 18.Half of 152 =
  19. 19.Half of 48 =
  20. 20.Half of 44 =
  21. 21.Double 55 =
  22. 22.Double 77 =
  23. 23.Half of 114 =
  24. 24.Half of 104 =
  25. 25.Double 73 =
  26. 26.Half of 166 =
  27. 27.Half of 162 =
  28. 28.Double 97 =
  29. 29.Double 79 =
  30. 30.Double 89 =
  31. 31.Half of 98 =
  32. 32.Double 84 =
  33. 33.Double 37 =
  34. 34.Double 67 =
  35. 35.Double 28 =
  36. 36.Half of 82 =
  37. 37.Double 83 =
  38. 38.Double 87 =
  39. 39.Half of 192 =
  40. 40.Double 54 =

Answer key

  1. 170
  2. 144
  3. 37
  4. 7
  5. 73
  6. 11
  7. 198
  8. 34
  9. 150
  10. 182
  11. 122
  12. 47
  13. 33
  14. 130
  15. 17
  16. 43
  17. 82
  18. 76
  19. 24
  20. 22
  21. 110
  22. 154
  23. 57
  24. 52
  25. 146
  26. 83
  27. 81
  28. 194
  29. 158
  30. 178
  31. 49
  32. 168
  33. 74
  34. 134
  35. 56
  36. 41
  37. 166
  38. 174
  39. 96
  40. 108

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