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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 397 · 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 176 =
  2. 2.Half of 76 =
  3. 3.Double 23 =
  4. 4.Half of 36 =
  5. 5.Half of 22 =
  6. 6.Double 19 =
  7. 7.Double 68 =
  8. 8.Half of 32 =
  9. 9.Double 22 =
  10. 10.Half of 92 =
  11. 11.Half of 154 =
  12. 12.Half of 112 =
  13. 13.Double 45 =
  14. 14.Double 21 =
  15. 15.Double 94 =
  16. 16.Half of 52 =
  17. 17.Double 77 =
  18. 18.Half of 132 =
  19. 19.Double 48 =
  20. 20.Double 66 =
  21. 21.Double 78 =
  22. 22.Half of 82 =
  23. 23.Double 17 =
  24. 24.Double 24 =
  25. 25.Half of 78 =
  26. 26.Double 11 =
  27. 27.Half of 122 =
  28. 28.Double 14 =
  29. 29.Double 83 =
  30. 30.Half of 134 =
  31. 31.Double 82 =
  32. 32.Half of 158 =
  33. 33.Half of 38 =
  34. 34.Half of 84 =
  35. 35.Double 32 =
  36. 36.Double 98 =
  37. 37.Half of 144 =
  38. 38.Half of 172 =
  39. 39.Half of 46 =
  40. 40.Half of 184 =

Answer key

  1. 88
  2. 38
  3. 46
  4. 18
  5. 11
  6. 38
  7. 136
  8. 16
  9. 44
  10. 46
  11. 77
  12. 56
  13. 90
  14. 42
  15. 188
  16. 26
  17. 154
  18. 66
  19. 96
  20. 132
  21. 156
  22. 41
  23. 34
  24. 48
  25. 39
  26. 22
  27. 61
  28. 28
  29. 166
  30. 67
  31. 164
  32. 79
  33. 19
  34. 42
  35. 64
  36. 196
  37. 72
  38. 86
  39. 23
  40. 92

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