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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 329 · 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 91 =
  2. 2.Double 81 =
  3. 3.Double 53 =
  4. 4.Half of 14 =
  5. 5.Double 52 =
  6. 6.Half of 56 =
  7. 7.Double 58 =
  8. 8.Half of 72 =
  9. 9.Half of 54 =
  10. 10.Half of 144 =
  11. 11.Double 48 =
  12. 12.Half of 124 =
  13. 13.Half of 38 =
  14. 14.Double 17 =
  15. 15.Double 14 =
  16. 16.Double 16 =
  17. 17.Double 87 =
  18. 18.Half of 192 =
  19. 19.Double 46 =
  20. 20.Double 65 =
  21. 21.Half of 196 =
  22. 22.Double 31 =
  23. 23.Half of 44 =
  24. 24.Double 24 =
  25. 25.Double 44 =
  26. 26.Half of 156 =
  27. 27.Double 72 =
  28. 28.Half of 172 =
  29. 29.Half of 108 =
  30. 30.Double 61 =
  31. 31.Half of 168 =
  32. 32.Double 85 =
  33. 33.Double 83 =
  34. 34.Double 51 =
  35. 35.Half of 12 =
  36. 36.Half of 62 =
  37. 37.Half of 134 =
  38. 38.Double 38 =
  39. 39.Half of 178 =
  40. 40.Half of 174 =

Answer key

  1. 182
  2. 162
  3. 106
  4. 7
  5. 104
  6. 28
  7. 116
  8. 36
  9. 27
  10. 72
  11. 96
  12. 62
  13. 19
  14. 34
  15. 28
  16. 32
  17. 174
  18. 96
  19. 92
  20. 130
  21. 98
  22. 62
  23. 22
  24. 48
  25. 88
  26. 78
  27. 144
  28. 86
  29. 54
  30. 122
  31. 84
  32. 170
  33. 166
  34. 102
  35. 6
  36. 31
  37. 67
  38. 76
  39. 89
  40. 87

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