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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 824 · 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 71 =
  2. 2.Double 44 =
  3. 3.Double 16 =
  4. 4.Double 47 =
  5. 5.Double 43 =
  6. 6.Half of 24 =
  7. 7.Double 59 =
  8. 8.Half of 72 =
  9. 9.Double 75 =
  10. 10.Double 81 =
  11. 11.Half of 132 =
  12. 12.Half of 34 =
  13. 13.Half of 82 =
  14. 14.Double 39 =
  15. 15.Double 25 =
  16. 16.Double 14 =
  17. 17.Half of 36 =
  18. 18.Double 35 =
  19. 19.Double 24 =
  20. 20.Double 41 =
  21. 21.Double 52 =
  22. 22.Double 76 =
  23. 23.Half of 92 =
  24. 24.Double 68 =
  25. 25.Half of 12 =
  26. 26.Half of 124 =
  27. 27.Double 28 =
  28. 28.Half of 106 =
  29. 29.Double 62 =
  30. 30.Double 12 =
  31. 31.Half of 182 =
  32. 32.Half of 162 =
  33. 33.Half of 112 =
  34. 34.Half of 158 =
  35. 35.Half of 192 =
  36. 36.Half of 138 =
  37. 37.Half of 172 =
  38. 38.Double 45 =
  39. 39.Double 33 =
  40. 40.Double 46 =

Answer key

  1. 142
  2. 88
  3. 32
  4. 94
  5. 86
  6. 12
  7. 118
  8. 36
  9. 150
  10. 162
  11. 66
  12. 17
  13. 41
  14. 78
  15. 50
  16. 28
  17. 18
  18. 70
  19. 48
  20. 82
  21. 104
  22. 152
  23. 46
  24. 136
  25. 6
  26. 62
  27. 56
  28. 53
  29. 124
  30. 24
  31. 91
  32. 81
  33. 56
  34. 79
  35. 96
  36. 69
  37. 86
  38. 90
  39. 66
  40. 92

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