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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 291 · 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 41 =
  2. 2.Half of 88 =
  3. 3.Double 73 =
  4. 4.Double 63 =
  5. 5.Double 27 =
  6. 6.Double 91 =
  7. 7.Half of 92 =
  8. 8.Half of 36 =
  9. 9.Half of 84 =
  10. 10.Half of 112 =
  11. 11.Half of 122 =
  12. 12.Half of 142 =
  13. 13.Double 68 =
  14. 14.Half of 188 =
  15. 15.Half of 132 =
  16. 16.Double 38 =
  17. 17.Half of 124 =
  18. 18.Half of 28 =
  19. 19.Half of 82 =
  20. 20.Half of 14 =
  21. 21.Double 87 =
  22. 22.Half of 176 =
  23. 23.Double 11 =
  24. 24.Half of 46 =
  25. 25.Double 83 =
  26. 26.Double 77 =
  27. 27.Double 72 =
  28. 28.Half of 38 =
  29. 29.Double 47 =
  30. 30.Half of 152 =
  31. 31.Half of 134 =
  32. 32.Half of 34 =
  33. 33.Half of 102 =
  34. 34.Double 43 =
  35. 35.Double 93 =
  36. 36.Half of 168 =
  37. 37.Double 42 =
  38. 38.Half of 74 =
  39. 39.Double 32 =
  40. 40.Double 69 =

Answer key

  1. 82
  2. 44
  3. 146
  4. 126
  5. 54
  6. 182
  7. 46
  8. 18
  9. 42
  10. 56
  11. 61
  12. 71
  13. 136
  14. 94
  15. 66
  16. 76
  17. 62
  18. 14
  19. 41
  20. 7
  21. 174
  22. 88
  23. 22
  24. 23
  25. 166
  26. 154
  27. 144
  28. 19
  29. 94
  30. 76
  31. 67
  32. 17
  33. 51
  34. 86
  35. 186
  36. 84
  37. 84
  38. 37
  39. 64
  40. 138

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