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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 475 · 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 42 =
  2. 2.Double 64 =
  3. 3.Double 54 =
  4. 4.Half of 92 =
  5. 5.Half of 66 =
  6. 6.Double 45 =
  7. 7.Double 51 =
  8. 8.Double 77 =
  9. 9.Double 72 =
  10. 10.Double 25 =
  11. 11.Half of 82 =
  12. 12.Half of 36 =
  13. 13.Double 65 =
  14. 14.Double 34 =
  15. 15.Double 11 =
  16. 16.Half of 68 =
  17. 17.Half of 162 =
  18. 18.Half of 34 =
  19. 19.Half of 46 =
  20. 20.Half of 102 =
  21. 21.Half of 28 =
  22. 22.Double 91 =
  23. 23.Double 83 =
  24. 24.Half of 168 =
  25. 25.Double 82 =
  26. 26.Double 21 =
  27. 27.Double 88 =
  28. 28.Half of 198 =
  29. 29.Half of 134 =
  30. 30.Double 66 =
  31. 31.Half of 112 =
  32. 32.Half of 122 =
  33. 33.Double 55 =
  34. 34.Double 36 =
  35. 35.Half of 128 =
  36. 36.Double 67 =
  37. 37.Double 32 =
  38. 38.Double 61 =
  39. 39.Half of 132 =
  40. 40.Double 96 =

Answer key

  1. 21
  2. 128
  3. 108
  4. 46
  5. 33
  6. 90
  7. 102
  8. 154
  9. 144
  10. 50
  11. 41
  12. 18
  13. 130
  14. 68
  15. 22
  16. 34
  17. 81
  18. 17
  19. 23
  20. 51
  21. 14
  22. 182
  23. 166
  24. 84
  25. 164
  26. 42
  27. 176
  28. 99
  29. 67
  30. 132
  31. 56
  32. 61
  33. 110
  34. 72
  35. 64
  36. 134
  37. 64
  38. 122
  39. 66
  40. 192

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