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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 835 · 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 172 =
  2. 2.Double 34 =
  3. 3.Half of 82 =
  4. 4.Half of 52 =
  5. 5.Double 43 =
  6. 6.Double 19 =
  7. 7.Double 68 =
  8. 8.Half of 16 =
  9. 9.Half of 26 =
  10. 10.Half of 62 =
  11. 11.Half of 156 =
  12. 12.Half of 86 =
  13. 13.Double 54 =
  14. 14.Half of 38 =
  15. 15.Double 91 =
  16. 16.Double 17 =
  17. 17.Half of 74 =
  18. 18.Double 18 =
  19. 19.Double 81 =
  20. 20.Half of 158 =
  21. 21.Double 36 =
  22. 22.Double 96 =
  23. 23.Double 52 =
  24. 24.Half of 188 =
  25. 25.Half of 116 =
  26. 26.Double 14 =
  27. 27.Double 47 =
  28. 28.Double 59 =
  29. 29.Half of 12 =
  30. 30.Double 66 =
  31. 31.Half of 34 =
  32. 32.Double 24 =
  33. 33.Double 63 =
  34. 34.Double 79 =
  35. 35.Double 73 =
  36. 36.Double 27 =
  37. 37.Half of 114 =
  38. 38.Half of 142 =
  39. 39.Double 74 =
  40. 40.Double 31 =

Answer key

  1. 86
  2. 68
  3. 41
  4. 26
  5. 86
  6. 38
  7. 136
  8. 8
  9. 13
  10. 31
  11. 78
  12. 43
  13. 108
  14. 19
  15. 182
  16. 34
  17. 37
  18. 36
  19. 162
  20. 79
  21. 72
  22. 192
  23. 104
  24. 94
  25. 58
  26. 28
  27. 94
  28. 118
  29. 6
  30. 132
  31. 17
  32. 48
  33. 126
  34. 158
  35. 146
  36. 54
  37. 57
  38. 71
  39. 148
  40. 62

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