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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 587 · 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 52 =
  2. 2.Half of 188 =
  3. 3.Double 42 =
  4. 4.Half of 182 =
  5. 5.Half of 102 =
  6. 6.Double 28 =
  7. 7.Half of 156 =
  8. 8.Half of 72 =
  9. 9.Half of 132 =
  10. 10.Half of 62 =
  11. 11.Half of 104 =
  12. 12.Double 86 =
  13. 13.Half of 134 =
  14. 14.Double 85 =
  15. 15.Half of 92 =
  16. 16.Double 38 =
  17. 17.Half of 32 =
  18. 18.Double 41 =
  19. 19.Double 72 =
  20. 20.Double 43 =
  21. 21.Half of 42 =
  22. 22.Half of 36 =
  23. 23.Half of 186 =
  24. 24.Half of 22 =
  25. 25.Half of 24 =
  26. 26.Half of 56 =
  27. 27.Half of 146 =
  28. 28.Double 58 =
  29. 29.Double 17 =
  30. 30.Double 18 =
  31. 31.Double 29 =
  32. 32.Double 15 =
  33. 33.Half of 138 =
  34. 34.Double 66 =
  35. 35.Half of 54 =
  36. 36.Half of 174 =
  37. 37.Half of 88 =
  38. 38.Half of 114 =
  39. 39.Half of 82 =
  40. 40.Double 79 =

Answer key

  1. 104
  2. 94
  3. 84
  4. 91
  5. 51
  6. 56
  7. 78
  8. 36
  9. 66
  10. 31
  11. 52
  12. 172
  13. 67
  14. 170
  15. 46
  16. 76
  17. 16
  18. 82
  19. 144
  20. 86
  21. 21
  22. 18
  23. 93
  24. 11
  25. 12
  26. 28
  27. 73
  28. 116
  29. 34
  30. 36
  31. 58
  32. 30
  33. 69
  34. 132
  35. 27
  36. 87
  37. 44
  38. 57
  39. 41
  40. 158

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