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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 504 · 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 29 =
  2. 2.Double 53 =
  3. 3.Double 56 =
  4. 4.Double 22 =
  5. 5.Half of 62 =
  6. 6.Double 24 =
  7. 7.Half of 46 =
  8. 8.Half of 154 =
  9. 9.Double 21 =
  10. 10.Double 26 =
  11. 11.Double 61 =
  12. 12.Half of 128 =
  13. 13.Half of 152 =
  14. 14.Half of 108 =
  15. 15.Half of 118 =
  16. 16.Double 81 =
  17. 17.Double 15 =
  18. 18.Half of 54 =
  19. 19.Double 51 =
  20. 20.Double 84 =
  21. 21.Half of 126 =
  22. 22.Double 45 =
  23. 23.Half of 134 =
  24. 24.Double 12 =
  25. 25.Double 13 =
  26. 26.Half of 22 =
  27. 27.Half of 182 =
  28. 28.Double 83 =
  29. 29.Double 54 =
  30. 30.Double 91 =
  31. 31.Half of 58 =
  32. 32.Double 41 =
  33. 33.Double 79 =
  34. 34.Half of 132 =
  35. 35.Half of 172 =
  36. 36.Half of 196 =
  37. 37.Half of 82 =
  38. 38.Half of 76 =
  39. 39.Half of 174 =
  40. 40.Double 68 =

Answer key

  1. 58
  2. 106
  3. 112
  4. 44
  5. 31
  6. 48
  7. 23
  8. 77
  9. 42
  10. 52
  11. 122
  12. 64
  13. 76
  14. 54
  15. 59
  16. 162
  17. 30
  18. 27
  19. 102
  20. 168
  21. 63
  22. 90
  23. 67
  24. 24
  25. 26
  26. 11
  27. 91
  28. 166
  29. 108
  30. 182
  31. 29
  32. 82
  33. 158
  34. 66
  35. 86
  36. 98
  37. 41
  38. 38
  39. 87
  40. 136

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