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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 118 · 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 166 =
  2. 2.Double 25 =
  3. 3.Half of 48 =
  4. 4.Half of 146 =
  5. 5.Half of 56 =
  6. 6.Double 57 =
  7. 7.Double 96 =
  8. 8.Half of 28 =
  9. 9.Double 71 =
  10. 10.Double 39 =
  11. 11.Double 38 =
  12. 12.Double 41 =
  13. 13.Half of 174 =
  14. 14.Half of 34 =
  15. 15.Half of 18 =
  16. 16.Double 56 =
  17. 17.Half of 94 =
  18. 18.Double 62 =
  19. 19.Double 87 =
  20. 20.Half of 62 =
  21. 21.Double 32 =
  22. 22.Half of 82 =
  23. 23.Double 15 =
  24. 24.Half of 176 =
  25. 25.Double 48 =
  26. 26.Half of 132 =
  27. 27.Half of 112 =
  28. 28.Half of 198 =
  29. 29.Double 83 =
  30. 30.Double 29 =
  31. 31.Half of 154 =
  32. 32.Double 64 =
  33. 33.Half of 26 =
  34. 34.Double 13 =
  35. 35.Double 31 =
  36. 36.Half of 144 =
  37. 37.Double 33 =
  38. 38.Half of 44 =
  39. 39.Double 42 =
  40. 40.Double 18 =

Answer key

  1. 83
  2. 50
  3. 24
  4. 73
  5. 28
  6. 114
  7. 192
  8. 14
  9. 142
  10. 78
  11. 76
  12. 82
  13. 87
  14. 17
  15. 9
  16. 112
  17. 47
  18. 124
  19. 174
  20. 31
  21. 64
  22. 41
  23. 30
  24. 88
  25. 96
  26. 66
  27. 56
  28. 99
  29. 166
  30. 58
  31. 77
  32. 128
  33. 13
  34. 26
  35. 62
  36. 72
  37. 66
  38. 22
  39. 84
  40. 36

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