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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 794 · 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 89 =
  2. 2.Half of 158 =
  3. 3.Double 12 =
  4. 4.Half of 72 =
  5. 5.Double 17 =
  6. 6.Half of 142 =
  7. 7.Half of 14 =
  8. 8.Half of 166 =
  9. 9.Half of 22 =
  10. 10.Double 45 =
  11. 11.Double 51 =
  12. 12.Half of 104 =
  13. 13.Half of 188 =
  14. 14.Half of 102 =
  15. 15.Half of 74 =
  16. 16.Double 41 =
  17. 17.Half of 24 =
  18. 18.Half of 34 =
  19. 19.Double 29 =
  20. 20.Double 28 =
  21. 21.Half of 86 =
  22. 22.Half of 112 =
  23. 23.Double 33 =
  24. 24.Half of 186 =
  25. 25.Double 86 =
  26. 26.Half of 134 =
  27. 27.Half of 122 =
  28. 28.Double 71 =
  29. 29.Double 23 =
  30. 30.Double 73 =
  31. 31.Double 15 =
  32. 32.Double 69 =
  33. 33.Double 85 =
  34. 34.Half of 12 =
  35. 35.Half of 164 =
  36. 36.Double 81 =
  37. 37.Half of 96 =
  38. 38.Double 31 =
  39. 39.Half of 38 =
  40. 40.Half of 56 =

Answer key

  1. 178
  2. 79
  3. 24
  4. 36
  5. 34
  6. 71
  7. 7
  8. 83
  9. 11
  10. 90
  11. 102
  12. 52
  13. 94
  14. 51
  15. 37
  16. 82
  17. 12
  18. 17
  19. 58
  20. 56
  21. 43
  22. 56
  23. 66
  24. 93
  25. 172
  26. 67
  27. 61
  28. 142
  29. 46
  30. 146
  31. 30
  32. 138
  33. 170
  34. 6
  35. 82
  36. 162
  37. 48
  38. 62
  39. 19
  40. 28

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