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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 758 · 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 28 =
  2. 2.Double 38 =
  3. 3.Double 34 =
  4. 4.Half of 116 =
  5. 5.Double 47 =
  6. 6.Double 99 =
  7. 7.Half of 76 =
  8. 8.Half of 66 =
  9. 9.Double 75 =
  10. 10.Double 27 =
  11. 11.Half of 48 =
  12. 12.Double 21 =
  13. 13.Double 71 =
  14. 14.Half of 144 =
  15. 15.Double 83 =
  16. 16.Half of 148 =
  17. 17.Half of 92 =
  18. 18.Half of 172 =
  19. 19.Double 82 =
  20. 20.Half of 62 =
  21. 21.Half of 138 =
  22. 22.Half of 136 =
  23. 23.Double 28 =
  24. 24.Half of 158 =
  25. 25.Double 31 =
  26. 26.Half of 18 =
  27. 27.Double 41 =
  28. 28.Half of 78 =
  29. 29.Double 95 =
  30. 30.Half of 132 =
  31. 31.Double 69 =
  32. 32.Half of 24 =
  33. 33.Double 85 =
  34. 34.Double 44 =
  35. 35.Half of 54 =
  36. 36.Half of 86 =
  37. 37.Double 77 =
  38. 38.Half of 46 =
  39. 39.Double 24 =
  40. 40.Half of 154 =

Answer key

  1. 14
  2. 76
  3. 68
  4. 58
  5. 94
  6. 198
  7. 38
  8. 33
  9. 150
  10. 54
  11. 24
  12. 42
  13. 142
  14. 72
  15. 166
  16. 74
  17. 46
  18. 86
  19. 164
  20. 31
  21. 69
  22. 68
  23. 56
  24. 79
  25. 62
  26. 9
  27. 82
  28. 39
  29. 190
  30. 66
  31. 138
  32. 12
  33. 170
  34. 88
  35. 27
  36. 43
  37. 154
  38. 23
  39. 48
  40. 77

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