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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 662 · 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 168 =
  2. 2.Double 11 =
  3. 3.Double 71 =
  4. 4.Double 37 =
  5. 5.Double 19 =
  6. 6.Double 81 =
  7. 7.Double 51 =
  8. 8.Half of 16 =
  9. 9.Half of 144 =
  10. 10.Half of 14 =
  11. 11.Half of 118 =
  12. 12.Half of 178 =
  13. 13.Double 35 =
  14. 14.Double 23 =
  15. 15.Half of 82 =
  16. 16.Half of 196 =
  17. 17.Double 77 =
  18. 18.Double 93 =
  19. 19.Double 16 =
  20. 20.Double 72 =
  21. 21.Half of 192 =
  22. 22.Double 73 =
  23. 23.Half of 34 =
  24. 24.Double 87 =
  25. 25.Double 22 =
  26. 26.Double 76 =
  27. 27.Double 98 =
  28. 28.Double 41 =
  29. 29.Half of 86 =
  30. 30.Double 28 =
  31. 31.Double 39 =
  32. 32.Double 54 =
  33. 33.Half of 44 =
  34. 34.Half of 62 =
  35. 35.Half of 66 =
  36. 36.Double 79 =
  37. 37.Half of 22 =
  38. 38.Half of 198 =
  39. 39.Double 12 =
  40. 40.Half of 174 =

Answer key

  1. 84
  2. 22
  3. 142
  4. 74
  5. 38
  6. 162
  7. 102
  8. 8
  9. 72
  10. 7
  11. 59
  12. 89
  13. 70
  14. 46
  15. 41
  16. 98
  17. 154
  18. 186
  19. 32
  20. 144
  21. 96
  22. 146
  23. 17
  24. 174
  25. 44
  26. 152
  27. 196
  28. 82
  29. 43
  30. 56
  31. 78
  32. 108
  33. 22
  34. 31
  35. 33
  36. 158
  37. 11
  38. 99
  39. 24
  40. 87

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