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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 503 · 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 21 =
  2. 2.Half of 152 =
  3. 3.Half of 158 =
  4. 4.Double 12 =
  5. 5.Half of 52 =
  6. 6.Half of 42 =
  7. 7.Half of 102 =
  8. 8.Half of 64 =
  9. 9.Double 11 =
  10. 10.Half of 68 =
  11. 11.Half of 192 =
  12. 12.Double 85 =
  13. 13.Double 33 =
  14. 14.Double 71 =
  15. 15.Double 95 =
  16. 16.Half of 78 =
  17. 17.Double 73 =
  18. 18.Double 91 =
  19. 19.Double 49 =
  20. 20.Half of 114 =
  21. 21.Half of 118 =
  22. 22.Double 67 =
  23. 23.Half of 172 =
  24. 24.Half of 34 =
  25. 25.Half of 132 =
  26. 26.Half of 198 =
  27. 27.Half of 82 =
  28. 28.Half of 142 =
  29. 29.Half of 108 =
  30. 30.Half of 154 =
  31. 31.Half of 146 =
  32. 32.Double 84 =
  33. 33.Double 61 =
  34. 34.Half of 24 =
  35. 35.Half of 66 =
  36. 36.Double 27 =
  37. 37.Half of 22 =
  38. 38.Double 79 =
  39. 39.Half of 12 =
  40. 40.Half of 112 =

Answer key

  1. 42
  2. 76
  3. 79
  4. 24
  5. 26
  6. 21
  7. 51
  8. 32
  9. 22
  10. 34
  11. 96
  12. 170
  13. 66
  14. 142
  15. 190
  16. 39
  17. 146
  18. 182
  19. 98
  20. 57
  21. 59
  22. 134
  23. 86
  24. 17
  25. 66
  26. 99
  27. 41
  28. 71
  29. 54
  30. 77
  31. 73
  32. 168
  33. 122
  34. 12
  35. 33
  36. 54
  37. 11
  38. 158
  39. 6
  40. 56

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