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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 63 · 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 38 =
  2. 2.Double 56 =
  3. 3.Double 72 =
  4. 4.Half of 182 =
  5. 5.Double 97 =
  6. 6.Half of 34 =
  7. 7.Double 71 =
  8. 8.Half of 142 =
  9. 9.Half of 62 =
  10. 10.Half of 102 =
  11. 11.Double 81 =
  12. 12.Double 21 =
  13. 13.Double 31 =
  14. 14.Half of 178 =
  15. 15.Half of 122 =
  16. 16.Double 37 =
  17. 17.Double 74 =
  18. 18.Double 25 =
  19. 19.Double 48 =
  20. 20.Half of 22 =
  21. 21.Half of 28 =
  22. 22.Double 96 =
  23. 23.Double 95 =
  24. 24.Half of 38 =
  25. 25.Double 41 =
  26. 26.Double 54 =
  27. 27.Double 61 =
  28. 28.Half of 16 =
  29. 29.Half of 192 =
  30. 30.Half of 42 =
  31. 31.Double 82 =
  32. 32.Double 62 =
  33. 33.Half of 104 =
  34. 34.Half of 26 =
  35. 35.Half of 52 =
  36. 36.Half of 32 =
  37. 37.Half of 12 =
  38. 38.Double 99 =
  39. 39.Half of 88 =
  40. 40.Double 89 =

Answer key

  1. 76
  2. 112
  3. 144
  4. 91
  5. 194
  6. 17
  7. 142
  8. 71
  9. 31
  10. 51
  11. 162
  12. 42
  13. 62
  14. 89
  15. 61
  16. 74
  17. 148
  18. 50
  19. 96
  20. 11
  21. 14
  22. 192
  23. 190
  24. 19
  25. 82
  26. 108
  27. 122
  28. 8
  29. 96
  30. 21
  31. 164
  32. 124
  33. 52
  34. 13
  35. 26
  36. 16
  37. 6
  38. 198
  39. 44
  40. 178

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