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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 120 · 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 32 =
  2. 2.Double 23 =
  3. 3.Half of 192 =
  4. 4.Double 65 =
  5. 5.Double 71 =
  6. 6.Half of 122 =
  7. 7.Double 73 =
  8. 8.Half of 62 =
  9. 9.Half of 182 =
  10. 10.Half of 92 =
  11. 11.Half of 156 =
  12. 12.Half of 78 =
  13. 13.Half of 16 =
  14. 14.Double 32 =
  15. 15.Half of 18 =
  16. 16.Double 83 =
  17. 17.Double 57 =
  18. 18.Double 55 =
  19. 19.Half of 22 =
  20. 20.Half of 162 =
  21. 21.Half of 132 =
  22. 22.Double 22 =
  23. 23.Double 42 =
  24. 24.Double 41 =
  25. 25.Double 31 =
  26. 26.Double 82 =
  27. 27.Double 66 =
  28. 28.Half of 56 =
  29. 29.Double 96 =
  30. 30.Half of 102 =
  31. 31.Half of 166 =
  32. 32.Half of 68 =
  33. 33.Double 88 =
  34. 34.Double 81 =
  35. 35.Double 78 =
  36. 36.Double 58 =
  37. 37.Double 97 =
  38. 38.Double 21 =
  39. 39.Double 48 =
  40. 40.Half of 158 =

Answer key

  1. 16
  2. 46
  3. 96
  4. 130
  5. 142
  6. 61
  7. 146
  8. 31
  9. 91
  10. 46
  11. 78
  12. 39
  13. 8
  14. 64
  15. 9
  16. 166
  17. 114
  18. 110
  19. 11
  20. 81
  21. 66
  22. 44
  23. 84
  24. 82
  25. 62
  26. 164
  27. 132
  28. 28
  29. 192
  30. 51
  31. 83
  32. 34
  33. 176
  34. 162
  35. 156
  36. 116
  37. 194
  38. 42
  39. 96
  40. 79

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