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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 399 · 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 76 =
  2. 2.Double 39 =
  3. 3.Half of 66 =
  4. 4.Double 71 =
  5. 5.Half of 104 =
  6. 6.Double 84 =
  7. 7.Half of 186 =
  8. 8.Half of 72 =
  9. 9.Half of 78 =
  10. 10.Half of 132 =
  11. 11.Double 11 =
  12. 12.Double 89 =
  13. 13.Half of 88 =
  14. 14.Double 82 =
  15. 15.Double 33 =
  16. 16.Double 24 =
  17. 17.Double 17 =
  18. 18.Double 92 =
  19. 19.Double 47 =
  20. 20.Double 67 =
  21. 21.Half of 34 =
  22. 22.Double 61 =
  23. 23.Half of 28 =
  24. 24.Double 13 =
  25. 25.Half of 12 =
  26. 26.Double 31 =
  27. 27.Half of 86 =
  28. 28.Double 83 =
  29. 29.Double 25 =
  30. 30.Half of 164 =
  31. 31.Double 45 =
  32. 32.Half of 146 =
  33. 33.Half of 64 =
  34. 34.Half of 22 =
  35. 35.Double 86 =
  36. 36.Double 38 =
  37. 37.Double 46 =
  38. 38.Double 12 =
  39. 39.Half of 188 =
  40. 40.Half of 38 =

Answer key

  1. 152
  2. 78
  3. 33
  4. 142
  5. 52
  6. 168
  7. 93
  8. 36
  9. 39
  10. 66
  11. 22
  12. 178
  13. 44
  14. 164
  15. 66
  16. 48
  17. 34
  18. 184
  19. 94
  20. 134
  21. 17
  22. 122
  23. 14
  24. 26
  25. 6
  26. 62
  27. 43
  28. 166
  29. 50
  30. 82
  31. 90
  32. 73
  33. 32
  34. 11
  35. 172
  36. 76
  37. 92
  38. 24
  39. 94
  40. 19

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