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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 804 · 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 98 =
  2. 2.Double 12 =
  3. 3.Half of 116 =
  4. 4.Half of 94 =
  5. 5.Double 67 =
  6. 6.Half of 52 =
  7. 7.Half of 56 =
  8. 8.Half of 74 =
  9. 9.Double 31 =
  10. 10.Half of 194 =
  11. 11.Double 57 =
  12. 12.Half of 72 =
  13. 13.Double 27 =
  14. 14.Half of 146 =
  15. 15.Double 88 =
  16. 16.Half of 12 =
  17. 17.Half of 22 =
  18. 18.Half of 62 =
  19. 19.Double 34 =
  20. 20.Half of 14 =
  21. 21.Double 24 =
  22. 22.Half of 162 =
  23. 23.Half of 152 =
  24. 24.Double 38 =
  25. 25.Half of 186 =
  26. 26.Half of 128 =
  27. 27.Double 97 =
  28. 28.Half of 122 =
  29. 29.Half of 36 =
  30. 30.Double 79 =
  31. 31.Double 99 =
  32. 32.Double 69 =
  33. 33.Double 28 =
  34. 34.Double 45 =
  35. 35.Double 77 =
  36. 36.Half of 82 =
  37. 37.Double 62 =
  38. 38.Double 49 =
  39. 39.Half of 114 =
  40. 40.Double 84 =

Answer key

  1. 196
  2. 24
  3. 58
  4. 47
  5. 134
  6. 26
  7. 28
  8. 37
  9. 62
  10. 97
  11. 114
  12. 36
  13. 54
  14. 73
  15. 176
  16. 6
  17. 11
  18. 31
  19. 68
  20. 7
  21. 48
  22. 81
  23. 76
  24. 76
  25. 93
  26. 64
  27. 194
  28. 61
  29. 18
  30. 158
  31. 198
  32. 138
  33. 56
  34. 90
  35. 154
  36. 41
  37. 124
  38. 98
  39. 57
  40. 168

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