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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 324 · 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 186 =
  2. 2.Double 63 =
  3. 3.Half of 106 =
  4. 4.Half of 142 =
  5. 5.Double 72 =
  6. 6.Double 54 =
  7. 7.Half of 88 =
  8. 8.Half of 28 =
  9. 9.Double 81 =
  10. 10.Double 27 =
  11. 11.Double 95 =
  12. 12.Double 39 =
  13. 13.Double 84 =
  14. 14.Double 13 =
  15. 15.Half of 182 =
  16. 16.Double 69 =
  17. 17.Double 56 =
  18. 18.Double 55 =
  19. 19.Half of 52 =
  20. 20.Double 68 =
  21. 21.Double 31 =
  22. 22.Half of 24 =
  23. 23.Double 24 =
  24. 24.Half of 16 =
  25. 25.Double 85 =
  26. 26.Half of 192 =
  27. 27.Double 36 =
  28. 28.Double 32 =
  29. 29.Double 18 =
  30. 30.Double 15 =
  31. 31.Half of 54 =
  32. 32.Half of 76 =
  33. 33.Half of 164 =
  34. 34.Half of 68 =
  35. 35.Double 47 =
  36. 36.Double 26 =
  37. 37.Half of 12 =
  38. 38.Double 62 =
  39. 39.Double 33 =
  40. 40.Half of 44 =

Answer key

  1. 93
  2. 126
  3. 53
  4. 71
  5. 144
  6. 108
  7. 44
  8. 14
  9. 162
  10. 54
  11. 190
  12. 78
  13. 168
  14. 26
  15. 91
  16. 138
  17. 112
  18. 110
  19. 26
  20. 136
  21. 62
  22. 12
  23. 48
  24. 8
  25. 170
  26. 96
  27. 72
  28. 64
  29. 36
  30. 30
  31. 27
  32. 38
  33. 82
  34. 34
  35. 94
  36. 52
  37. 6
  38. 124
  39. 66
  40. 22

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