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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 21 · 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.Half of 76 =
  2. 2.Double 86 =
  3. 3.Half of 192 =
  4. 4.Double 89 =
  5. 5.Double 26 =
  6. 6.Half of 72 =
  7. 7.Double 88 =
  8. 8.Double 97 =
  9. 9.Double 38 =
  10. 10.Double 87 =
  11. 11.Double 64 =
  12. 12.Double 32 =
  13. 13.Double 57 =
  14. 14.Double 49 =
  15. 15.Double 54 =
  16. 16.Half of 24 =
  17. 17.Half of 186 =
  18. 18.Half of 168 =
  19. 19.Half of 82 =
  20. 20.Double 21 =
  21. 21.Half of 108 =
  22. 22.Half of 178 =
  23. 23.Double 71 =
  24. 24.Half of 56 =
  25. 25.Half of 136 =
  26. 26.Double 36 =
  27. 27.Half of 138 =
  28. 28.Double 95 =
  29. 29.Half of 86 =
  30. 30.Double 47 =
  31. 31.Half of 58 =
  32. 32.Half of 164 =
  33. 33.Double 77 =
  34. 34.Double 28 =
  35. 35.Double 34 =
  36. 36.Double 99 =
  37. 37.Double 68 =
  38. 38.Double 75 =
  39. 39.Double 69 =
  40. 40.Double 73 =

Answer key

  1. 38
  2. 172
  3. 96
  4. 178
  5. 52
  6. 36
  7. 176
  8. 194
  9. 76
  10. 174
  11. 128
  12. 64
  13. 114
  14. 98
  15. 108
  16. 12
  17. 93
  18. 84
  19. 41
  20. 42
  21. 54
  22. 89
  23. 142
  24. 28
  25. 68
  26. 72
  27. 69
  28. 190
  29. 43
  30. 94
  31. 29
  32. 82
  33. 154
  34. 56
  35. 68
  36. 198
  37. 136
  38. 150
  39. 138
  40. 146

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