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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 284 · 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 22 =
  2. 2.Double 62 =
  3. 3.Half of 34 =
  4. 4.Double 27 =
  5. 5.Double 19 =
  6. 6.Double 91 =
  7. 7.Double 38 =
  8. 8.Double 85 =
  9. 9.Double 82 =
  10. 10.Double 33 =
  11. 11.Double 29 =
  12. 12.Double 25 =
  13. 13.Half of 182 =
  14. 14.Double 16 =
  15. 15.Half of 98 =
  16. 16.Double 72 =
  17. 17.Half of 198 =
  18. 18.Half of 112 =
  19. 19.Double 34 =
  20. 20.Double 11 =
  21. 21.Half of 48 =
  22. 22.Half of 184 =
  23. 23.Half of 176 =
  24. 24.Half of 106 =
  25. 25.Double 79 =
  26. 26.Half of 76 =
  27. 27.Half of 164 =
  28. 28.Double 41 =
  29. 29.Double 31 =
  30. 30.Double 93 =
  31. 31.Half of 14 =
  32. 32.Double 36 =
  33. 33.Double 39 =
  34. 34.Half of 18 =
  35. 35.Double 61 =
  36. 36.Half of 62 =
  37. 37.Double 83 =
  38. 38.Double 56 =
  39. 39.Half of 24 =
  40. 40.Half of 52 =

Answer key

  1. 11
  2. 124
  3. 17
  4. 54
  5. 38
  6. 182
  7. 76
  8. 170
  9. 164
  10. 66
  11. 58
  12. 50
  13. 91
  14. 32
  15. 49
  16. 144
  17. 99
  18. 56
  19. 68
  20. 22
  21. 24
  22. 92
  23. 88
  24. 53
  25. 158
  26. 38
  27. 82
  28. 82
  29. 62
  30. 186
  31. 7
  32. 72
  33. 78
  34. 9
  35. 122
  36. 31
  37. 166
  38. 112
  39. 12
  40. 26

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