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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 412 · 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 44 =
  2. 2.Double 28 =
  3. 3.Double 73 =
  4. 4.Half of 32 =
  5. 5.Double 42 =
  6. 6.Half of 12 =
  7. 7.Half of 16 =
  8. 8.Half of 26 =
  9. 9.Double 23 =
  10. 10.Half of 128 =
  11. 11.Half of 106 =
  12. 12.Double 95 =
  13. 13.Half of 86 =
  14. 14.Half of 118 =
  15. 15.Double 15 =
  16. 16.Double 88 =
  17. 17.Double 64 =
  18. 18.Double 51 =
  19. 19.Double 96 =
  20. 20.Double 69 =
  21. 21.Double 17 =
  22. 22.Double 94 =
  23. 23.Double 89 =
  24. 24.Double 76 =
  25. 25.Double 85 =
  26. 26.Double 81 =
  27. 27.Double 41 =
  28. 28.Half of 182 =
  29. 29.Half of 108 =
  30. 30.Half of 54 =
  31. 31.Half of 38 =
  32. 32.Double 71 =
  33. 33.Half of 28 =
  34. 34.Double 58 =
  35. 35.Half of 94 =
  36. 36.Double 99 =
  37. 37.Double 33 =
  38. 38.Half of 156 =
  39. 39.Double 66 =
  40. 40.Double 48 =

Answer key

  1. 22
  2. 56
  3. 146
  4. 16
  5. 84
  6. 6
  7. 8
  8. 13
  9. 46
  10. 64
  11. 53
  12. 190
  13. 43
  14. 59
  15. 30
  16. 176
  17. 128
  18. 102
  19. 192
  20. 138
  21. 34
  22. 188
  23. 178
  24. 152
  25. 170
  26. 162
  27. 82
  28. 91
  29. 54
  30. 27
  31. 19
  32. 142
  33. 14
  34. 116
  35. 47
  36. 198
  37. 66
  38. 78
  39. 132
  40. 96

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