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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 407 · 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 186 =
  2. 2.Double 32 =
  3. 3.Double 44 =
  4. 4.Double 14 =
  5. 5.Half of 72 =
  6. 6.Double 42 =
  7. 7.Half of 102 =
  8. 8.Half of 168 =
  9. 9.Half of 84 =
  10. 10.Half of 62 =
  11. 11.Half of 34 =
  12. 12.Half of 132 =
  13. 13.Double 47 =
  14. 14.Double 97 =
  15. 15.Half of 108 =
  16. 16.Double 73 =
  17. 17.Double 35 =
  18. 18.Half of 52 =
  19. 19.Half of 116 =
  20. 20.Double 58 =
  21. 21.Half of 112 =
  22. 22.Double 41 =
  23. 23.Half of 82 =
  24. 24.Double 17 =
  25. 25.Half of 18 =
  26. 26.Half of 74 =
  27. 27.Half of 38 =
  28. 28.Half of 14 =
  29. 29.Half of 16 =
  30. 30.Double 57 =
  31. 31.Half of 12 =
  32. 32.Double 69 =
  33. 33.Double 66 =
  34. 34.Half of 46 =
  35. 35.Half of 194 =
  36. 36.Half of 144 =
  37. 37.Double 23 =
  38. 38.Half of 142 =
  39. 39.Double 64 =
  40. 40.Half of 92 =

Answer key

  1. 93
  2. 64
  3. 88
  4. 28
  5. 36
  6. 84
  7. 51
  8. 84
  9. 42
  10. 31
  11. 17
  12. 66
  13. 94
  14. 194
  15. 54
  16. 146
  17. 70
  18. 26
  19. 58
  20. 116
  21. 56
  22. 82
  23. 41
  24. 34
  25. 9
  26. 37
  27. 19
  28. 7
  29. 8
  30. 114
  31. 6
  32. 138
  33. 132
  34. 23
  35. 97
  36. 72
  37. 46
  38. 71
  39. 128
  40. 46

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