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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 483 · 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 84 =
  2. 2.Half of 106 =
  3. 3.Half of 172 =
  4. 4.Half of 36 =
  5. 5.Double 21 =
  6. 6.Double 85 =
  7. 7.Double 25 =
  8. 8.Double 17 =
  9. 9.Double 98 =
  10. 10.Double 68 =
  11. 11.Double 51 =
  12. 12.Half of 76 =
  13. 13.Half of 16 =
  14. 14.Half of 108 =
  15. 15.Double 71 =
  16. 16.Double 79 =
  17. 17.Double 39 =
  18. 18.Double 13 =
  19. 19.Double 76 =
  20. 20.Double 81 =
  21. 21.Half of 102 =
  22. 22.Double 82 =
  23. 23.Double 35 =
  24. 24.Double 92 =
  25. 25.Half of 166 =
  26. 26.Double 73 =
  27. 27.Double 66 =
  28. 28.Half of 38 =
  29. 29.Double 28 =
  30. 30.Half of 122 =
  31. 31.Half of 146 =
  32. 32.Half of 154 =
  33. 33.Double 24 =
  34. 34.Double 22 =
  35. 35.Half of 52 =
  36. 36.Half of 54 =
  37. 37.Half of 62 =
  38. 38.Half of 68 =
  39. 39.Double 58 =
  40. 40.Half of 58 =

Answer key

  1. 42
  2. 53
  3. 86
  4. 18
  5. 42
  6. 170
  7. 50
  8. 34
  9. 196
  10. 136
  11. 102
  12. 38
  13. 8
  14. 54
  15. 142
  16. 158
  17. 78
  18. 26
  19. 152
  20. 162
  21. 51
  22. 164
  23. 70
  24. 184
  25. 83
  26. 146
  27. 132
  28. 19
  29. 56
  30. 61
  31. 73
  32. 77
  33. 48
  34. 44
  35. 26
  36. 27
  37. 31
  38. 34
  39. 116
  40. 29

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