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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 314 · 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 77 =
  2. 2.Half of 122 =
  3. 3.Double 18 =
  4. 4.Half of 38 =
  5. 5.Half of 104 =
  6. 6.Half of 194 =
  7. 7.Half of 76 =
  8. 8.Double 79 =
  9. 9.Double 68 =
  10. 10.Double 72 =
  11. 11.Half of 174 =
  12. 12.Double 66 =
  13. 13.Double 21 =
  14. 14.Half of 48 =
  15. 15.Half of 112 =
  16. 16.Half of 82 =
  17. 17.Double 41 =
  18. 18.Half of 184 =
  19. 19.Double 96 =
  20. 20.Double 45 =
  21. 21.Double 31 =
  22. 22.Double 93 =
  23. 23.Half of 64 =
  24. 24.Half of 172 =
  25. 25.Double 17 =
  26. 26.Half of 182 =
  27. 27.Half of 178 =
  28. 28.Half of 154 =
  29. 29.Half of 126 =
  30. 30.Double 39 =
  31. 31.Half of 42 =
  32. 32.Double 29 =
  33. 33.Half of 108 =
  34. 34.Half of 14 =
  35. 35.Double 53 =
  36. 36.Half of 192 =
  37. 37.Half of 124 =
  38. 38.Half of 54 =
  39. 39.Double 85 =
  40. 40.Double 22 =

Answer key

  1. 154
  2. 61
  3. 36
  4. 19
  5. 52
  6. 97
  7. 38
  8. 158
  9. 136
  10. 144
  11. 87
  12. 132
  13. 42
  14. 24
  15. 56
  16. 41
  17. 82
  18. 92
  19. 192
  20. 90
  21. 62
  22. 186
  23. 32
  24. 86
  25. 34
  26. 91
  27. 89
  28. 77
  29. 63
  30. 78
  31. 21
  32. 58
  33. 54
  34. 7
  35. 106
  36. 96
  37. 62
  38. 27
  39. 170
  40. 44

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