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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 779 · 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 62 =
  2. 2.Half of 32 =
  3. 3.Half of 12 =
  4. 4.Double 21 =
  5. 5.Half of 192 =
  6. 6.Half of 36 =
  7. 7.Double 35 =
  8. 8.Half of 42 =
  9. 9.Double 19 =
  10. 10.Half of 34 =
  11. 11.Half of 84 =
  12. 12.Half of 168 =
  13. 13.Half of 122 =
  14. 14.Half of 78 =
  15. 15.Double 31 =
  16. 16.Half of 66 =
  17. 17.Double 29 =
  18. 18.Half of 26 =
  19. 19.Double 22 =
  20. 20.Double 14 =
  21. 21.Half of 92 =
  22. 22.Half of 146 =
  23. 23.Half of 138 =
  24. 24.Double 75 =
  25. 25.Double 54 =
  26. 26.Half of 178 =
  27. 27.Half of 136 =
  28. 28.Half of 186 =
  29. 29.Double 13 =
  30. 30.Double 99 =
  31. 31.Half of 96 =
  32. 32.Half of 18 =
  33. 33.Double 91 =
  34. 34.Double 65 =
  35. 35.Double 57 =
  36. 36.Double 41 =
  37. 37.Half of 28 =
  38. 38.Half of 162 =
  39. 39.Double 51 =
  40. 40.Half of 194 =

Answer key

  1. 124
  2. 16
  3. 6
  4. 42
  5. 96
  6. 18
  7. 70
  8. 21
  9. 38
  10. 17
  11. 42
  12. 84
  13. 61
  14. 39
  15. 62
  16. 33
  17. 58
  18. 13
  19. 44
  20. 28
  21. 46
  22. 73
  23. 69
  24. 150
  25. 108
  26. 89
  27. 68
  28. 93
  29. 26
  30. 198
  31. 48
  32. 9
  33. 182
  34. 130
  35. 114
  36. 82
  37. 14
  38. 81
  39. 102
  40. 97

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