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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 830 · 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 19 =
  2. 2.Double 86 =
  3. 3.Half of 24 =
  4. 4.Double 37 =
  5. 5.Half of 112 =
  6. 6.Half of 32 =
  7. 7.Double 69 =
  8. 8.Half of 164 =
  9. 9.Half of 68 =
  10. 10.Double 85 =
  11. 11.Half of 18 =
  12. 12.Double 77 =
  13. 13.Half of 88 =
  14. 14.Double 96 =
  15. 15.Half of 186 =
  16. 16.Half of 144 =
  17. 17.Double 71 =
  18. 18.Half of 182 =
  19. 19.Half of 84 =
  20. 20.Half of 122 =
  21. 21.Half of 22 =
  22. 22.Double 31 =
  23. 23.Half of 98 =
  24. 24.Half of 26 =
  25. 25.Half of 64 =
  26. 26.Double 66 =
  27. 27.Half of 82 =
  28. 28.Half of 184 =
  29. 29.Half of 128 =
  30. 30.Half of 152 =
  31. 31.Half of 142 =
  32. 32.Half of 54 =
  33. 33.Half of 42 =
  34. 34.Double 73 =
  35. 35.Half of 58 =
  36. 36.Half of 66 =
  37. 37.Double 84 =
  38. 38.Double 51 =
  39. 39.Double 23 =
  40. 40.Double 14 =

Answer key

  1. 38
  2. 172
  3. 12
  4. 74
  5. 56
  6. 16
  7. 138
  8. 82
  9. 34
  10. 170
  11. 9
  12. 154
  13. 44
  14. 192
  15. 93
  16. 72
  17. 142
  18. 91
  19. 42
  20. 61
  21. 11
  22. 62
  23. 49
  24. 13
  25. 32
  26. 132
  27. 41
  28. 92
  29. 64
  30. 76
  31. 71
  32. 27
  33. 21
  34. 146
  35. 29
  36. 33
  37. 168
  38. 102
  39. 46
  40. 28

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