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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 315 · 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 81 =
  2. 2.Half of 194 =
  3. 3.Double 46 =
  4. 4.Double 92 =
  5. 5.Double 99 =
  6. 6.Half of 82 =
  7. 7.Double 28 =
  8. 8.Double 61 =
  9. 9.Half of 108 =
  10. 10.Double 71 =
  11. 11.Double 25 =
  12. 12.Double 85 =
  13. 13.Half of 172 =
  14. 14.Double 93 =
  15. 15.Double 52 =
  16. 16.Double 54 =
  17. 17.Double 14 =
  18. 18.Double 27 =
  19. 19.Double 38 =
  20. 20.Half of 158 =
  21. 21.Double 33 =
  22. 22.Half of 56 =
  23. 23.Half of 52 =
  24. 24.Half of 182 =
  25. 25.Half of 176 =
  26. 26.Double 84 =
  27. 27.Half of 142 =
  28. 28.Double 55 =
  29. 29.Double 91 =
  30. 30.Half of 62 =
  31. 31.Half of 132 =
  32. 32.Half of 36 =
  33. 33.Double 26 =
  34. 34.Half of 102 =
  35. 35.Double 97 =
  36. 36.Half of 64 =
  37. 37.Half of 196 =
  38. 38.Double 58 =
  39. 39.Half of 112 =
  40. 40.Half of 164 =

Answer key

  1. 162
  2. 97
  3. 92
  4. 184
  5. 198
  6. 41
  7. 56
  8. 122
  9. 54
  10. 142
  11. 50
  12. 170
  13. 86
  14. 186
  15. 104
  16. 108
  17. 28
  18. 54
  19. 76
  20. 79
  21. 66
  22. 28
  23. 26
  24. 91
  25. 88
  26. 168
  27. 71
  28. 110
  29. 182
  30. 31
  31. 66
  32. 18
  33. 52
  34. 51
  35. 194
  36. 32
  37. 98
  38. 116
  39. 56
  40. 82

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