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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 318 · 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 132 =
  2. 2.Double 19 =
  3. 3.Double 29 =
  4. 4.Double 51 =
  5. 5.Double 25 =
  6. 6.Double 88 =
  7. 7.Half of 168 =
  8. 8.Half of 64 =
  9. 9.Double 61 =
  10. 10.Half of 192 =
  11. 11.Half of 68 =
  12. 12.Half of 18 =
  13. 13.Double 84 =
  14. 14.Double 27 =
  15. 15.Half of 114 =
  16. 16.Double 26 =
  17. 17.Double 42 =
  18. 18.Double 83 =
  19. 19.Double 94 =
  20. 20.Double 16 =
  21. 21.Double 47 =
  22. 22.Half of 112 =
  23. 23.Double 68 =
  24. 24.Half of 172 =
  25. 25.Half of 122 =
  26. 26.Double 41 =
  27. 27.Double 79 =
  28. 28.Half of 116 =
  29. 29.Half of 72 =
  30. 30.Double 71 =
  31. 31.Half of 164 =
  32. 32.Half of 188 =
  33. 33.Double 99 =
  34. 34.Double 31 =
  35. 35.Double 15 =
  36. 36.Half of 36 =
  37. 37.Double 97 =
  38. 38.Half of 46 =
  39. 39.Double 78 =
  40. 40.Double 17 =

Answer key

  1. 66
  2. 38
  3. 58
  4. 102
  5. 50
  6. 176
  7. 84
  8. 32
  9. 122
  10. 96
  11. 34
  12. 9
  13. 168
  14. 54
  15. 57
  16. 52
  17. 84
  18. 166
  19. 188
  20. 32
  21. 94
  22. 56
  23. 136
  24. 86
  25. 61
  26. 82
  27. 158
  28. 58
  29. 36
  30. 142
  31. 82
  32. 94
  33. 198
  34. 62
  35. 30
  36. 18
  37. 194
  38. 23
  39. 156
  40. 34

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