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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 323 · 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 15 =
  2. 2.Double 82 =
  3. 3.Half of 122 =
  4. 4.Half of 14 =
  5. 5.Double 83 =
  6. 6.Double 23 =
  7. 7.Half of 166 =
  8. 8.Double 27 =
  9. 9.Half of 192 =
  10. 10.Half of 28 =
  11. 11.Half of 44 =
  12. 12.Half of 194 =
  13. 13.Double 91 =
  14. 14.Half of 18 =
  15. 15.Half of 108 =
  16. 16.Double 71 =
  17. 17.Double 68 =
  18. 18.Double 53 =
  19. 19.Half of 112 =
  20. 20.Half of 68 =
  21. 21.Half of 76 =
  22. 22.Half of 148 =
  23. 23.Half of 172 =
  24. 24.Double 87 =
  25. 25.Double 51 =
  26. 26.Double 38 =
  27. 27.Double 95 =
  28. 28.Double 67 =
  29. 29.Half of 102 =
  30. 30.Double 19 =
  31. 31.Double 63 =
  32. 32.Double 97 =
  33. 33.Double 93 =
  34. 34.Half of 162 =
  35. 35.Half of 32 =
  36. 36.Double 45 =
  37. 37.Half of 142 =
  38. 38.Double 81 =
  39. 39.Half of 66 =
  40. 40.Half of 158 =

Answer key

  1. 30
  2. 164
  3. 61
  4. 7
  5. 166
  6. 46
  7. 83
  8. 54
  9. 96
  10. 14
  11. 22
  12. 97
  13. 182
  14. 9
  15. 54
  16. 142
  17. 136
  18. 106
  19. 56
  20. 34
  21. 38
  22. 74
  23. 86
  24. 174
  25. 102
  26. 76
  27. 190
  28. 134
  29. 51
  30. 38
  31. 126
  32. 194
  33. 186
  34. 81
  35. 16
  36. 90
  37. 71
  38. 162
  39. 33
  40. 79

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