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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 166 · 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 92 =
  2. 2.Half of 36 =
  3. 3.Half of 186 =
  4. 4.Double 29 =
  5. 5.Double 74 =
  6. 6.Double 75 =
  7. 7.Half of 92 =
  8. 8.Double 71 =
  9. 9.Double 34 =
  10. 10.Half of 182 =
  11. 11.Half of 156 =
  12. 12.Double 91 =
  13. 13.Double 37 =
  14. 14.Half of 142 =
  15. 15.Half of 196 =
  16. 16.Half of 148 =
  17. 17.Half of 34 =
  18. 18.Double 13 =
  19. 19.Half of 164 =
  20. 20.Half of 138 =
  21. 21.Double 19 =
  22. 22.Half of 162 =
  23. 23.Half of 172 =
  24. 24.Half of 22 =
  25. 25.Half of 136 =
  26. 26.Half of 94 =
  27. 27.Double 27 =
  28. 28.Double 72 =
  29. 29.Half of 58 =
  30. 30.Double 45 =
  31. 31.Double 51 =
  32. 32.Double 78 =
  33. 33.Double 25 =
  34. 34.Half of 38 =
  35. 35.Half of 82 =
  36. 36.Double 86 =
  37. 37.Half of 62 =
  38. 38.Half of 54 =
  39. 39.Half of 24 =
  40. 40.Double 47 =

Answer key

  1. 184
  2. 18
  3. 93
  4. 58
  5. 148
  6. 150
  7. 46
  8. 142
  9. 68
  10. 91
  11. 78
  12. 182
  13. 74
  14. 71
  15. 98
  16. 74
  17. 17
  18. 26
  19. 82
  20. 69
  21. 38
  22. 81
  23. 86
  24. 11
  25. 68
  26. 47
  27. 54
  28. 144
  29. 29
  30. 90
  31. 102
  32. 156
  33. 50
  34. 19
  35. 41
  36. 172
  37. 31
  38. 27
  39. 12
  40. 94

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