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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 544 · 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 71 =
  2. 2.Double 87 =
  3. 3.Double 42 =
  4. 4.Half of 132 =
  5. 5.Double 76 =
  6. 6.Half of 54 =
  7. 7.Double 31 =
  8. 8.Double 66 =
  9. 9.Double 94 =
  10. 10.Half of 144 =
  11. 11.Half of 138 =
  12. 12.Double 46 =
  13. 13.Half of 168 =
  14. 14.Half of 86 =
  15. 15.Double 58 =
  16. 16.Double 41 =
  17. 17.Double 37 =
  18. 18.Double 18 =
  19. 19.Double 93 =
  20. 20.Double 82 =
  21. 21.Half of 18 =
  22. 22.Half of 24 =
  23. 23.Half of 108 =
  24. 24.Double 98 =
  25. 25.Double 88 =
  26. 26.Half of 174 =
  27. 27.Half of 44 =
  28. 28.Half of 84 =
  29. 29.Half of 134 =
  30. 30.Half of 88 =
  31. 31.Double 91 =
  32. 32.Double 57 =
  33. 33.Half of 146 =
  34. 34.Double 68 =
  35. 35.Double 13 =
  36. 36.Double 54 =
  37. 37.Half of 186 =
  38. 38.Half of 62 =
  39. 39.Half of 72 =
  40. 40.Double 62 =

Answer key

  1. 142
  2. 174
  3. 84
  4. 66
  5. 152
  6. 27
  7. 62
  8. 132
  9. 188
  10. 72
  11. 69
  12. 92
  13. 84
  14. 43
  15. 116
  16. 82
  17. 74
  18. 36
  19. 186
  20. 164
  21. 9
  22. 12
  23. 54
  24. 196
  25. 176
  26. 87
  27. 22
  28. 42
  29. 67
  30. 44
  31. 182
  32. 114
  33. 73
  34. 136
  35. 26
  36. 108
  37. 93
  38. 31
  39. 36
  40. 124

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