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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 151 · 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 22 =
  2. 2.Double 33 =
  3. 3.Double 34 =
  4. 4.Double 52 =
  5. 5.Double 44 =
  6. 6.Half of 156 =
  7. 7.Half of 102 =
  8. 8.Double 58 =
  9. 9.Double 71 =
  10. 10.Double 17 =
  11. 11.Half of 106 =
  12. 12.Double 92 =
  13. 13.Double 79 =
  14. 14.Double 51 =
  15. 15.Half of 116 =
  16. 16.Half of 74 =
  17. 17.Double 97 =
  18. 18.Half of 108 =
  19. 19.Double 16 =
  20. 20.Double 32 =
  21. 21.Double 82 =
  22. 22.Double 18 =
  23. 23.Half of 174 =
  24. 24.Half of 154 =
  25. 25.Half of 122 =
  26. 26.Double 15 =
  27. 27.Half of 88 =
  28. 28.Double 13 =
  29. 29.Double 31 =
  30. 30.Double 56 =
  31. 31.Double 21 =
  32. 32.Double 26 =
  33. 33.Double 84 =
  34. 34.Double 68 =
  35. 35.Half of 152 =
  36. 36.Half of 34 =
  37. 37.Half of 16 =
  38. 38.Half of 42 =
  39. 39.Double 12 =
  40. 40.Half of 38 =

Answer key

  1. 11
  2. 66
  3. 68
  4. 104
  5. 88
  6. 78
  7. 51
  8. 116
  9. 142
  10. 34
  11. 53
  12. 184
  13. 158
  14. 102
  15. 58
  16. 37
  17. 194
  18. 54
  19. 32
  20. 64
  21. 164
  22. 36
  23. 87
  24. 77
  25. 61
  26. 30
  27. 44
  28. 26
  29. 62
  30. 112
  31. 42
  32. 52
  33. 168
  34. 136
  35. 76
  36. 17
  37. 8
  38. 21
  39. 24
  40. 19

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