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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 731 · 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 87 =
  2. 2.Double 99 =
  3. 3.Half of 48 =
  4. 4.Half of 74 =
  5. 5.Double 61 =
  6. 6.Double 79 =
  7. 7.Double 57 =
  8. 8.Half of 24 =
  9. 9.Half of 116 =
  10. 10.Half of 18 =
  11. 11.Half of 122 =
  12. 12.Half of 56 =
  13. 13.Double 14 =
  14. 14.Half of 196 =
  15. 15.Double 83 =
  16. 16.Double 71 =
  17. 17.Half of 166 =
  18. 18.Double 88 =
  19. 19.Half of 36 =
  20. 20.Half of 182 =
  21. 21.Double 45 =
  22. 22.Double 91 =
  23. 23.Double 21 =
  24. 24.Double 22 =
  25. 25.Double 66 =
  26. 26.Double 23 =
  27. 27.Half of 112 =
  28. 28.Half of 192 =
  29. 29.Half of 106 =
  30. 30.Half of 172 =
  31. 31.Double 86 =
  32. 32.Double 36 =
  33. 33.Half of 62 =
  34. 34.Double 95 =
  35. 35.Half of 14 =
  36. 36.Double 59 =
  37. 37.Half of 52 =
  38. 38.Half of 156 =
  39. 39.Double 28 =
  40. 40.Double 41 =

Answer key

  1. 174
  2. 198
  3. 24
  4. 37
  5. 122
  6. 158
  7. 114
  8. 12
  9. 58
  10. 9
  11. 61
  12. 28
  13. 28
  14. 98
  15. 166
  16. 142
  17. 83
  18. 176
  19. 18
  20. 91
  21. 90
  22. 182
  23. 42
  24. 44
  25. 132
  26. 46
  27. 56
  28. 96
  29. 53
  30. 86
  31. 172
  32. 72
  33. 31
  34. 190
  35. 7
  36. 118
  37. 26
  38. 78
  39. 56
  40. 82

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