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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 636 · 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.Double 33 =
  2. 2.Half of 26 =
  3. 3.Half of 36 =
  4. 4.Half of 32 =
  5. 5.Double 47 =
  6. 6.Double 41 =
  7. 7.Double 82 =
  8. 8.Double 58 =
  9. 9.Double 81 =
  10. 10.Half of 78 =
  11. 11.Double 44 =
  12. 12.Half of 152 =
  13. 13.Half of 138 =
  14. 14.Double 18 =
  15. 15.Half of 144 =
  16. 16.Double 21 =
  17. 17.Half of 48 =
  18. 18.Double 12 =
  19. 19.Double 96 =
  20. 20.Half of 22 =
  21. 21.Half of 108 =
  22. 22.Half of 46 =
  23. 23.Double 61 =
  24. 24.Double 19 =
  25. 25.Half of 164 =
  26. 26.Half of 64 =
  27. 27.Half of 16 =
  28. 28.Double 28 =
  29. 29.Half of 168 =
  30. 30.Half of 98 =
  31. 31.Half of 142 =
  32. 32.Double 85 =
  33. 33.Double 39 =
  34. 34.Double 51 =
  35. 35.Half of 192 =
  36. 36.Double 45 =
  37. 37.Half of 68 =
  38. 38.Half of 54 =
  39. 39.Double 42 =
  40. 40.Double 24 =

Answer key

  1. 66
  2. 13
  3. 18
  4. 16
  5. 94
  6. 82
  7. 164
  8. 116
  9. 162
  10. 39
  11. 88
  12. 76
  13. 69
  14. 36
  15. 72
  16. 42
  17. 24
  18. 24
  19. 192
  20. 11
  21. 54
  22. 23
  23. 122
  24. 38
  25. 82
  26. 32
  27. 8
  28. 56
  29. 84
  30. 49
  31. 71
  32. 170
  33. 78
  34. 102
  35. 96
  36. 90
  37. 34
  38. 27
  39. 84
  40. 48

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