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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 211 · 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 21 =
  2. 2.Double 61 =
  3. 3.Double 59 =
  4. 4.Double 31 =
  5. 5.Double 55 =
  6. 6.Double 12 =
  7. 7.Half of 64 =
  8. 8.Half of 34 =
  9. 9.Half of 116 =
  10. 10.Double 84 =
  11. 11.Half of 118 =
  12. 12.Double 83 =
  13. 13.Half of 132 =
  14. 14.Half of 188 =
  15. 15.Half of 182 =
  16. 16.Double 58 =
  17. 17.Half of 54 =
  18. 18.Half of 122 =
  19. 19.Double 16 =
  20. 20.Double 25 =
  21. 21.Double 93 =
  22. 22.Half of 28 =
  23. 23.Double 27 =
  24. 24.Half of 186 =
  25. 25.Double 95 =
  26. 26.Double 71 =
  27. 27.Double 52 =
  28. 28.Double 43 =
  29. 29.Double 75 =
  30. 30.Half of 162 =
  31. 31.Double 32 =
  32. 32.Double 46 =
  33. 33.Half of 26 =
  34. 34.Double 92 =
  35. 35.Double 78 =
  36. 36.Half of 184 =
  37. 37.Double 24 =
  38. 38.Half of 156 =
  39. 39.Double 36 =
  40. 40.Half of 82 =

Answer key

  1. 42
  2. 122
  3. 118
  4. 62
  5. 110
  6. 24
  7. 32
  8. 17
  9. 58
  10. 168
  11. 59
  12. 166
  13. 66
  14. 94
  15. 91
  16. 116
  17. 27
  18. 61
  19. 32
  20. 50
  21. 186
  22. 14
  23. 54
  24. 93
  25. 190
  26. 142
  27. 104
  28. 86
  29. 150
  30. 81
  31. 64
  32. 92
  33. 13
  34. 184
  35. 156
  36. 92
  37. 48
  38. 78
  39. 72
  40. 41

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