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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 570 · 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 186 =
  2. 2.Double 57 =
  3. 3.Double 97 =
  4. 4.Double 84 =
  5. 5.Half of 66 =
  6. 6.Double 49 =
  7. 7.Half of 58 =
  8. 8.Half of 136 =
  9. 9.Double 41 =
  10. 10.Half of 64 =
  11. 11.Half of 156 =
  12. 12.Double 58 =
  13. 13.Double 81 =
  14. 14.Double 19 =
  15. 15.Double 62 =
  16. 16.Double 76 =
  17. 17.Half of 162 =
  18. 18.Double 12 =
  19. 19.Double 96 =
  20. 20.Half of 142 =
  21. 21.Double 42 =
  22. 22.Double 91 =
  23. 23.Double 94 =
  24. 24.Double 51 =
  25. 25.Double 79 =
  26. 26.Double 14 =
  27. 27.Double 83 =
  28. 28.Double 98 =
  29. 29.Double 31 =
  30. 30.Half of 158 =
  31. 31.Double 33 =
  32. 32.Double 54 =
  33. 33.Half of 18 =
  34. 34.Half of 152 =
  35. 35.Half of 92 =
  36. 36.Double 18 =
  37. 37.Half of 192 =
  38. 38.Double 55 =
  39. 39.Double 66 =
  40. 40.Double 32 =

Answer key

  1. 93
  2. 114
  3. 194
  4. 168
  5. 33
  6. 98
  7. 29
  8. 68
  9. 82
  10. 32
  11. 78
  12. 116
  13. 162
  14. 38
  15. 124
  16. 152
  17. 81
  18. 24
  19. 192
  20. 71
  21. 84
  22. 182
  23. 188
  24. 102
  25. 158
  26. 28
  27. 166
  28. 196
  29. 62
  30. 79
  31. 66
  32. 108
  33. 9
  34. 76
  35. 46
  36. 36
  37. 96
  38. 110
  39. 132
  40. 64

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