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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 811 · 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.Double 42 =
  2. 2.Double 76 =
  3. 3.Half of 106 =
  4. 4.Double 27 =
  5. 5.Half of 114 =
  6. 6.Half of 192 =
  7. 7.Double 87 =
  8. 8.Half of 124 =
  9. 9.Double 66 =
  10. 10.Half of 174 =
  11. 11.Double 46 =
  12. 12.Half of 34 =
  13. 13.Half of 52 =
  14. 14.Double 16 =
  15. 15.Double 62 =
  16. 16.Half of 22 =
  17. 17.Half of 72 =
  18. 18.Half of 118 =
  19. 19.Double 61 =
  20. 20.Half of 32 =
  21. 21.Double 15 =
  22. 22.Half of 78 =
  23. 23.Double 96 =
  24. 24.Half of 24 =
  25. 25.Double 51 =
  26. 26.Double 81 =
  27. 27.Half of 122 =
  28. 28.Double 71 =
  29. 29.Double 65 =
  30. 30.Double 31 =
  31. 31.Half of 66 =
  32. 32.Half of 178 =
  33. 33.Double 35 =
  34. 34.Half of 76 =
  35. 35.Half of 16 =
  36. 36.Double 11 =
  37. 37.Half of 82 =
  38. 38.Half of 92 =
  39. 39.Half of 172 =
  40. 40.Half of 166 =

Answer key

  1. 84
  2. 152
  3. 53
  4. 54
  5. 57
  6. 96
  7. 174
  8. 62
  9. 132
  10. 87
  11. 92
  12. 17
  13. 26
  14. 32
  15. 124
  16. 11
  17. 36
  18. 59
  19. 122
  20. 16
  21. 30
  22. 39
  23. 192
  24. 12
  25. 102
  26. 162
  27. 61
  28. 142
  29. 130
  30. 62
  31. 33
  32. 89
  33. 70
  34. 38
  35. 8
  36. 22
  37. 41
  38. 46
  39. 86
  40. 83

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