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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 181 · 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 13 =
  2. 2.Double 86 =
  3. 3.Half of 106 =
  4. 4.Double 23 =
  5. 5.Double 54 =
  6. 6.Double 21 =
  7. 7.Half of 22 =
  8. 8.Half of 82 =
  9. 9.Double 16 =
  10. 10.Double 53 =
  11. 11.Half of 36 =
  12. 12.Double 15 =
  13. 13.Half of 14 =
  14. 14.Half of 182 =
  15. 15.Double 55 =
  16. 16.Double 97 =
  17. 17.Double 64 =
  18. 18.Double 51 =
  19. 19.Double 31 =
  20. 20.Double 71 =
  21. 21.Double 28 =
  22. 22.Double 34 =
  23. 23.Half of 84 =
  24. 24.Half of 158 =
  25. 25.Double 99 =
  26. 26.Double 65 =
  27. 27.Half of 156 =
  28. 28.Double 66 =
  29. 29.Half of 68 =
  30. 30.Half of 34 =
  31. 31.Double 25 =
  32. 32.Half of 72 =
  33. 33.Half of 52 =
  34. 34.Half of 32 =
  35. 35.Double 32 =
  36. 36.Double 79 =
  37. 37.Half of 162 =
  38. 38.Double 14 =
  39. 39.Half of 178 =
  40. 40.Half of 92 =

Answer key

  1. 26
  2. 172
  3. 53
  4. 46
  5. 108
  6. 42
  7. 11
  8. 41
  9. 32
  10. 106
  11. 18
  12. 30
  13. 7
  14. 91
  15. 110
  16. 194
  17. 128
  18. 102
  19. 62
  20. 142
  21. 56
  22. 68
  23. 42
  24. 79
  25. 198
  26. 130
  27. 78
  28. 132
  29. 34
  30. 17
  31. 50
  32. 36
  33. 26
  34. 16
  35. 64
  36. 158
  37. 81
  38. 28
  39. 89
  40. 46

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