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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 819 · 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 86 =
  2. 2.Double 71 =
  3. 3.Double 91 =
  4. 4.Half of 182 =
  5. 5.Double 61 =
  6. 6.Half of 134 =
  7. 7.Double 45 =
  8. 8.Half of 102 =
  9. 9.Half of 86 =
  10. 10.Half of 34 =
  11. 11.Half of 16 =
  12. 12.Half of 136 =
  13. 13.Half of 22 =
  14. 14.Half of 188 =
  15. 15.Half of 106 =
  16. 16.Half of 174 =
  17. 17.Half of 66 =
  18. 18.Double 44 =
  19. 19.Double 84 =
  20. 20.Half of 38 =
  21. 21.Half of 164 =
  22. 22.Double 81 =
  23. 23.Half of 58 =
  24. 24.Half of 194 =
  25. 25.Half of 46 =
  26. 26.Double 48 =
  27. 27.Double 73 =
  28. 28.Half of 172 =
  29. 29.Double 51 =
  30. 30.Double 36 =
  31. 31.Half of 28 =
  32. 32.Double 92 =
  33. 33.Half of 52 =
  34. 34.Double 15 =
  35. 35.Double 82 =
  36. 36.Half of 18 =
  37. 37.Half of 132 =
  38. 38.Half of 168 =
  39. 39.Double 13 =
  40. 40.Double 39 =

Answer key

  1. 172
  2. 142
  3. 182
  4. 91
  5. 122
  6. 67
  7. 90
  8. 51
  9. 43
  10. 17
  11. 8
  12. 68
  13. 11
  14. 94
  15. 53
  16. 87
  17. 33
  18. 88
  19. 168
  20. 19
  21. 82
  22. 162
  23. 29
  24. 97
  25. 23
  26. 96
  27. 146
  28. 86
  29. 102
  30. 72
  31. 14
  32. 184
  33. 26
  34. 30
  35. 164
  36. 9
  37. 66
  38. 84
  39. 26
  40. 78

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