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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 66 · 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 12 =
  2. 2.Double 81 =
  3. 3.Double 31 =
  4. 4.Double 65 =
  5. 5.Double 46 =
  6. 6.Half of 32 =
  7. 7.Double 21 =
  8. 8.Half of 22 =
  9. 9.Double 25 =
  10. 10.Half of 124 =
  11. 11.Double 72 =
  12. 12.Double 71 =
  13. 13.Double 41 =
  14. 14.Half of 188 =
  15. 15.Double 49 =
  16. 16.Double 44 =
  17. 17.Half of 182 =
  18. 18.Double 48 =
  19. 19.Half of 186 =
  20. 20.Double 34 =
  21. 21.Half of 122 =
  22. 22.Double 78 =
  23. 23.Half of 64 =
  24. 24.Double 68 =
  25. 25.Double 27 =
  26. 26.Double 91 =
  27. 27.Half of 46 =
  28. 28.Double 89 =
  29. 29.Double 32 =
  30. 30.Double 11 =
  31. 31.Double 88 =
  32. 32.Double 97 =
  33. 33.Double 57 =
  34. 34.Half of 96 =
  35. 35.Double 42 =
  36. 36.Half of 164 =
  37. 37.Double 87 =
  38. 38.Double 56 =
  39. 39.Half of 42 =
  40. 40.Half of 26 =

Answer key

  1. 6
  2. 162
  3. 62
  4. 130
  5. 92
  6. 16
  7. 42
  8. 11
  9. 50
  10. 62
  11. 144
  12. 142
  13. 82
  14. 94
  15. 98
  16. 88
  17. 91
  18. 96
  19. 93
  20. 68
  21. 61
  22. 156
  23. 32
  24. 136
  25. 54
  26. 182
  27. 23
  28. 178
  29. 64
  30. 22
  31. 176
  32. 194
  33. 114
  34. 48
  35. 84
  36. 82
  37. 174
  38. 112
  39. 21
  40. 13

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