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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 205 · 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 36 =
  2. 2.Double 55 =
  3. 3.Double 36 =
  4. 4.Double 12 =
  5. 5.Half of 12 =
  6. 6.Half of 62 =
  7. 7.Half of 122 =
  8. 8.Double 31 =
  9. 9.Double 59 =
  10. 10.Half of 172 =
  11. 11.Double 73 =
  12. 12.Double 46 =
  13. 13.Half of 184 =
  14. 14.Double 61 =
  15. 15.Double 93 =
  16. 16.Half of 196 =
  17. 17.Half of 156 =
  18. 18.Double 78 =
  19. 19.Half of 72 =
  20. 20.Double 51 =
  21. 21.Double 42 =
  22. 22.Double 67 =
  23. 23.Double 91 =
  24. 24.Double 99 =
  25. 25.Double 81 =
  26. 26.Half of 66 =
  27. 27.Double 84 =
  28. 28.Double 54 =
  29. 29.Double 43 =
  30. 30.Half of 52 =
  31. 31.Double 27 =
  32. 32.Half of 82 =
  33. 33.Half of 112 =
  34. 34.Half of 84 =
  35. 35.Half of 124 =
  36. 36.Double 53 =
  37. 37.Half of 68 =
  38. 38.Double 32 =
  39. 39.Half of 88 =
  40. 40.Half of 92 =

Answer key

  1. 18
  2. 110
  3. 72
  4. 24
  5. 6
  6. 31
  7. 61
  8. 62
  9. 118
  10. 86
  11. 146
  12. 92
  13. 92
  14. 122
  15. 186
  16. 98
  17. 78
  18. 156
  19. 36
  20. 102
  21. 84
  22. 134
  23. 182
  24. 198
  25. 162
  26. 33
  27. 168
  28. 108
  29. 86
  30. 26
  31. 54
  32. 41
  33. 56
  34. 42
  35. 62
  36. 106
  37. 34
  38. 64
  39. 44
  40. 46

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