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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 81 · 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 124 =
  2. 2.Double 96 =
  3. 3.Double 54 =
  4. 4.Double 45 =
  5. 5.Double 89 =
  6. 6.Double 61 =
  7. 7.Double 13 =
  8. 8.Double 25 =
  9. 9.Half of 174 =
  10. 10.Double 53 =
  11. 11.Half of 26 =
  12. 12.Half of 108 =
  13. 13.Double 23 =
  14. 14.Double 99 =
  15. 15.Double 33 =
  16. 16.Double 32 =
  17. 17.Half of 116 =
  18. 18.Double 97 =
  19. 19.Double 19 =
  20. 20.Half of 84 =
  21. 21.Half of 178 =
  22. 22.Double 88 =
  23. 23.Double 21 =
  24. 24.Double 76 =
  25. 25.Double 42 =
  26. 26.Half of 128 =
  27. 27.Double 15 =
  28. 28.Half of 158 =
  29. 29.Half of 16 =
  30. 30.Half of 74 =
  31. 31.Double 26 =
  32. 32.Double 31 =
  33. 33.Double 12 =
  34. 34.Half of 22 =
  35. 35.Half of 46 =
  36. 36.Double 36 =
  37. 37.Half of 38 =
  38. 38.Half of 132 =
  39. 39.Half of 12 =
  40. 40.Half of 194 =

Answer key

  1. 62
  2. 192
  3. 108
  4. 90
  5. 178
  6. 122
  7. 26
  8. 50
  9. 87
  10. 106
  11. 13
  12. 54
  13. 46
  14. 198
  15. 66
  16. 64
  17. 58
  18. 194
  19. 38
  20. 42
  21. 89
  22. 176
  23. 42
  24. 152
  25. 84
  26. 64
  27. 30
  28. 79
  29. 8
  30. 37
  31. 52
  32. 62
  33. 24
  34. 11
  35. 23
  36. 72
  37. 19
  38. 66
  39. 6
  40. 97

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