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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 23 · 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 33 =
  2. 2.Half of 118 =
  3. 3.Half of 164 =
  4. 4.Double 91 =
  5. 5.Double 89 =
  6. 6.Half of 42 =
  7. 7.Double 58 =
  8. 8.Half of 168 =
  9. 9.Double 52 =
  10. 10.Half of 124 =
  11. 11.Double 83 =
  12. 12.Double 85 =
  13. 13.Half of 152 =
  14. 14.Double 95 =
  15. 15.Double 93 =
  16. 16.Double 61 =
  17. 17.Double 88 =
  18. 18.Double 66 =
  19. 19.Half of 44 =
  20. 20.Half of 196 =
  21. 21.Double 41 =
  22. 22.Double 67 =
  23. 23.Half of 106 =
  24. 24.Half of 172 =
  25. 25.Half of 38 =
  26. 26.Half of 174 =
  27. 27.Double 42 =
  28. 28.Half of 122 =
  29. 29.Double 47 =
  30. 30.Double 87 =
  31. 31.Half of 36 =
  32. 32.Double 97 =
  33. 33.Half of 142 =
  34. 34.Double 27 =
  35. 35.Half of 24 =
  36. 36.Double 69 =
  37. 37.Half of 192 =
  38. 38.Double 68 =
  39. 39.Double 82 =
  40. 40.Half of 176 =

Answer key

  1. 66
  2. 59
  3. 82
  4. 182
  5. 178
  6. 21
  7. 116
  8. 84
  9. 104
  10. 62
  11. 166
  12. 170
  13. 76
  14. 190
  15. 186
  16. 122
  17. 176
  18. 132
  19. 22
  20. 98
  21. 82
  22. 134
  23. 53
  24. 86
  25. 19
  26. 87
  27. 84
  28. 61
  29. 94
  30. 174
  31. 18
  32. 194
  33. 71
  34. 54
  35. 12
  36. 138
  37. 96
  38. 136
  39. 164
  40. 88

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