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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 421 · 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 186 =
  2. 2.Half of 112 =
  3. 3.Half of 36 =
  4. 4.Double 55 =
  5. 5.Double 41 =
  6. 6.Double 43 =
  7. 7.Half of 42 =
  8. 8.Double 82 =
  9. 9.Half of 172 =
  10. 10.Double 31 =
  11. 11.Double 22 =
  12. 12.Half of 56 =
  13. 13.Half of 46 =
  14. 14.Half of 12 =
  15. 15.Double 33 =
  16. 16.Half of 74 =
  17. 17.Double 62 =
  18. 18.Double 96 =
  19. 19.Double 77 =
  20. 20.Double 25 =
  21. 21.Half of 102 =
  22. 22.Double 36 =
  23. 23.Double 48 =
  24. 24.Half of 32 =
  25. 25.Double 24 =
  26. 26.Double 99 =
  27. 27.Double 42 =
  28. 28.Half of 142 =
  29. 29.Double 54 =
  30. 30.Half of 92 =
  31. 31.Half of 68 =
  32. 32.Half of 22 =
  33. 33.Double 47 =
  34. 34.Half of 28 =
  35. 35.Half of 182 =
  36. 36.Double 23 =
  37. 37.Double 15 =
  38. 38.Half of 88 =
  39. 39.Half of 84 =
  40. 40.Double 29 =

Answer key

  1. 93
  2. 56
  3. 18
  4. 110
  5. 82
  6. 86
  7. 21
  8. 164
  9. 86
  10. 62
  11. 44
  12. 28
  13. 23
  14. 6
  15. 66
  16. 37
  17. 124
  18. 192
  19. 154
  20. 50
  21. 51
  22. 72
  23. 96
  24. 16
  25. 48
  26. 198
  27. 84
  28. 71
  29. 108
  30. 46
  31. 34
  32. 11
  33. 94
  34. 14
  35. 91
  36. 46
  37. 30
  38. 44
  39. 42
  40. 58

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