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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 322 · 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 54 =
  2. 2.Half of 188 =
  3. 3.Double 35 =
  4. 4.Double 37 =
  5. 5.Double 86 =
  6. 6.Double 87 =
  7. 7.Half of 142 =
  8. 8.Double 61 =
  9. 9.Half of 132 =
  10. 10.Double 31 =
  11. 11.Double 43 =
  12. 12.Double 13 =
  13. 13.Double 68 =
  14. 14.Double 81 =
  15. 15.Double 29 =
  16. 16.Double 44 =
  17. 17.Double 46 =
  18. 18.Half of 66 =
  19. 19.Half of 138 =
  20. 20.Double 19 =
  21. 21.Half of 174 =
  22. 22.Half of 64 =
  23. 23.Double 82 =
  24. 24.Half of 112 =
  25. 25.Half of 172 =
  26. 26.Double 95 =
  27. 27.Half of 52 =
  28. 28.Double 71 =
  29. 29.Half of 42 =
  30. 30.Half of 74 =
  31. 31.Half of 22 =
  32. 32.Double 58 =
  33. 33.Double 69 =
  34. 34.Double 79 =
  35. 35.Double 26 =
  36. 36.Half of 144 =
  37. 37.Half of 36 =
  38. 38.Double 59 =
  39. 39.Double 21 =
  40. 40.Half of 178 =

Answer key

  1. 108
  2. 94
  3. 70
  4. 74
  5. 172
  6. 174
  7. 71
  8. 122
  9. 66
  10. 62
  11. 86
  12. 26
  13. 136
  14. 162
  15. 58
  16. 88
  17. 92
  18. 33
  19. 69
  20. 38
  21. 87
  22. 32
  23. 164
  24. 56
  25. 86
  26. 190
  27. 26
  28. 142
  29. 21
  30. 37
  31. 11
  32. 116
  33. 138
  34. 158
  35. 52
  36. 72
  37. 18
  38. 118
  39. 42
  40. 89

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