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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 354 · 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 17 =
  2. 2.Double 97 =
  3. 3.Double 89 =
  4. 4.Double 55 =
  5. 5.Double 68 =
  6. 6.Half of 82 =
  7. 7.Half of 108 =
  8. 8.Double 39 =
  9. 9.Half of 56 =
  10. 10.Half of 172 =
  11. 11.Half of 102 =
  12. 12.Half of 194 =
  13. 13.Half of 184 =
  14. 14.Double 35 =
  15. 15.Double 34 =
  16. 16.Double 32 =
  17. 17.Half of 58 =
  18. 18.Double 71 =
  19. 19.Half of 186 =
  20. 20.Double 29 =
  21. 21.Double 56 =
  22. 22.Half of 48 =
  23. 23.Half of 152 =
  24. 24.Half of 34 =
  25. 25.Double 31 =
  26. 26.Double 59 =
  27. 27.Double 86 =
  28. 28.Double 14 =
  29. 29.Half of 112 =
  30. 30.Double 33 =
  31. 31.Double 52 =
  32. 32.Half of 38 =
  33. 33.Double 96 =
  34. 34.Double 51 =
  35. 35.Half of 142 =
  36. 36.Double 79 =
  37. 37.Half of 118 =
  38. 38.Double 81 =
  39. 39.Double 65 =
  40. 40.Half of 146 =

Answer key

  1. 34
  2. 194
  3. 178
  4. 110
  5. 136
  6. 41
  7. 54
  8. 78
  9. 28
  10. 86
  11. 51
  12. 97
  13. 92
  14. 70
  15. 68
  16. 64
  17. 29
  18. 142
  19. 93
  20. 58
  21. 112
  22. 24
  23. 76
  24. 17
  25. 62
  26. 118
  27. 172
  28. 28
  29. 56
  30. 66
  31. 104
  32. 19
  33. 192
  34. 102
  35. 71
  36. 158
  37. 59
  38. 162
  39. 130
  40. 73

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