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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 675 · 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 44 =
  2. 2.Half of 118 =
  3. 3.Double 35 =
  4. 4.Half of 186 =
  5. 5.Half of 128 =
  6. 6.Double 46 =
  7. 7.Double 61 =
  8. 8.Double 82 =
  9. 9.Double 38 =
  10. 10.Half of 192 =
  11. 11.Half of 66 =
  12. 12.Double 86 =
  13. 13.Double 41 =
  14. 14.Double 95 =
  15. 15.Half of 124 =
  16. 16.Half of 138 =
  17. 17.Half of 72 =
  18. 18.Double 99 =
  19. 19.Half of 98 =
  20. 20.Half of 148 =
  21. 21.Half of 146 =
  22. 22.Half of 34 =
  23. 23.Half of 78 =
  24. 24.Double 73 =
  25. 25.Half of 106 =
  26. 26.Double 89 =
  27. 27.Double 43 =
  28. 28.Half of 184 =
  29. 29.Double 85 =
  30. 30.Half of 92 =
  31. 31.Half of 166 =
  32. 32.Double 11 =
  33. 33.Half of 126 =
  34. 34.Double 69 =
  35. 35.Half of 162 =
  36. 36.Half of 42 =
  37. 37.Double 71 =
  38. 38.Double 27 =
  39. 39.Half of 64 =
  40. 40.Half of 12 =

Answer key

  1. 88
  2. 59
  3. 70
  4. 93
  5. 64
  6. 92
  7. 122
  8. 164
  9. 76
  10. 96
  11. 33
  12. 172
  13. 82
  14. 190
  15. 62
  16. 69
  17. 36
  18. 198
  19. 49
  20. 74
  21. 73
  22. 17
  23. 39
  24. 146
  25. 53
  26. 178
  27. 86
  28. 92
  29. 170
  30. 46
  31. 83
  32. 22
  33. 63
  34. 138
  35. 81
  36. 21
  37. 142
  38. 54
  39. 32
  40. 6

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