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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 378 · 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 81 =
  2. 2.Double 72 =
  3. 3.Half of 194 =
  4. 4.Double 56 =
  5. 5.Double 51 =
  6. 6.Half of 192 =
  7. 7.Double 23 =
  8. 8.Half of 26 =
  9. 9.Double 71 =
  10. 10.Half of 64 =
  11. 11.Double 31 =
  12. 12.Double 34 =
  13. 13.Half of 96 =
  14. 14.Half of 172 =
  15. 15.Half of 74 =
  16. 16.Half of 76 =
  17. 17.Half of 188 =
  18. 18.Half of 22 =
  19. 19.Double 33 =
  20. 20.Half of 12 =
  21. 21.Half of 42 =
  22. 22.Half of 52 =
  23. 23.Half of 28 =
  24. 24.Half of 142 =
  25. 25.Half of 72 =
  26. 26.Double 69 =
  27. 27.Half of 116 =
  28. 28.Half of 106 =
  29. 29.Half of 82 =
  30. 30.Double 61 =
  31. 31.Double 94 =
  32. 32.Double 19 =
  33. 33.Half of 124 =
  34. 34.Half of 18 =
  35. 35.Double 91 =
  36. 36.Half of 122 =
  37. 37.Half of 132 =
  38. 38.Half of 148 =
  39. 39.Half of 154 =
  40. 40.Half of 32 =

Answer key

  1. 162
  2. 144
  3. 97
  4. 112
  5. 102
  6. 96
  7. 46
  8. 13
  9. 142
  10. 32
  11. 62
  12. 68
  13. 48
  14. 86
  15. 37
  16. 38
  17. 94
  18. 11
  19. 66
  20. 6
  21. 21
  22. 26
  23. 14
  24. 71
  25. 36
  26. 138
  27. 58
  28. 53
  29. 41
  30. 122
  31. 188
  32. 38
  33. 62
  34. 9
  35. 182
  36. 61
  37. 66
  38. 74
  39. 77
  40. 16

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