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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 592 · 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.Half of 154 =
  2. 2.Double 42 =
  3. 3.Double 26 =
  4. 4.Double 56 =
  5. 5.Half of 12 =
  6. 6.Double 53 =
  7. 7.Half of 28 =
  8. 8.Double 83 =
  9. 9.Double 18 =
  10. 10.Double 72 =
  11. 11.Double 71 =
  12. 12.Double 52 =
  13. 13.Half of 196 =
  14. 14.Half of 86 =
  15. 15.Double 22 =
  16. 16.Half of 194 =
  17. 17.Double 95 =
  18. 18.Half of 124 =
  19. 19.Half of 134 =
  20. 20.Half of 132 =
  21. 21.Half of 174 =
  22. 22.Double 96 =
  23. 23.Double 91 =
  24. 24.Double 31 =
  25. 25.Double 49 =
  26. 26.Half of 66 =
  27. 27.Half of 118 =
  28. 28.Half of 16 =
  29. 29.Half of 82 =
  30. 30.Double 82 =
  31. 31.Double 69 =
  32. 32.Double 61 =
  33. 33.Double 99 =
  34. 34.Double 27 =
  35. 35.Double 46 =
  36. 36.Double 36 =
  37. 37.Double 88 =
  38. 38.Double 33 =
  39. 39.Half of 68 =
  40. 40.Double 37 =

Answer key

  1. 77
  2. 84
  3. 52
  4. 112
  5. 6
  6. 106
  7. 14
  8. 166
  9. 36
  10. 144
  11. 142
  12. 104
  13. 98
  14. 43
  15. 44
  16. 97
  17. 190
  18. 62
  19. 67
  20. 66
  21. 87
  22. 192
  23. 182
  24. 62
  25. 98
  26. 33
  27. 59
  28. 8
  29. 41
  30. 164
  31. 138
  32. 122
  33. 198
  34. 54
  35. 92
  36. 72
  37. 176
  38. 66
  39. 34
  40. 74

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