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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 799 · 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 92 =
  2. 2.Half of 12 =
  3. 3.Double 72 =
  4. 4.Double 31 =
  5. 5.Double 67 =
  6. 6.Half of 32 =
  7. 7.Double 52 =
  8. 8.Double 24 =
  9. 9.Double 15 =
  10. 10.Double 64 =
  11. 11.Double 51 =
  12. 12.Half of 122 =
  13. 13.Double 13 =
  14. 14.Double 76 =
  15. 15.Double 75 =
  16. 16.Double 16 =
  17. 17.Double 26 =
  18. 18.Half of 138 =
  19. 19.Half of 34 =
  20. 20.Half of 134 =
  21. 21.Double 59 =
  22. 22.Double 83 =
  23. 23.Half of 66 =
  24. 24.Half of 26 =
  25. 25.Half of 82 =
  26. 26.Double 46 =
  27. 27.Double 34 =
  28. 28.Double 29 =
  29. 29.Half of 132 =
  30. 30.Double 68 =
  31. 31.Half of 182 =
  32. 32.Double 65 =
  33. 33.Double 73 =
  34. 34.Double 36 =
  35. 35.Half of 42 =
  36. 36.Half of 198 =
  37. 37.Half of 152 =
  38. 38.Double 61 =
  39. 39.Half of 48 =
  40. 40.Half of 74 =

Answer key

  1. 46
  2. 6
  3. 144
  4. 62
  5. 134
  6. 16
  7. 104
  8. 48
  9. 30
  10. 128
  11. 102
  12. 61
  13. 26
  14. 152
  15. 150
  16. 32
  17. 52
  18. 69
  19. 17
  20. 67
  21. 118
  22. 166
  23. 33
  24. 13
  25. 41
  26. 92
  27. 68
  28. 58
  29. 66
  30. 136
  31. 91
  32. 130
  33. 146
  34. 72
  35. 21
  36. 99
  37. 76
  38. 122
  39. 24
  40. 37

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