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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 531 · 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 138 =
  2. 2.Half of 22 =
  3. 3.Half of 192 =
  4. 4.Double 43 =
  5. 5.Double 47 =
  6. 6.Double 84 =
  7. 7.Double 91 =
  8. 8.Half of 122 =
  9. 9.Half of 128 =
  10. 10.Double 62 =
  11. 11.Half of 52 =
  12. 12.Double 31 =
  13. 13.Double 73 =
  14. 14.Double 33 =
  15. 15.Double 81 =
  16. 16.Half of 152 =
  17. 17.Half of 148 =
  18. 18.Double 25 =
  19. 19.Half of 94 =
  20. 20.Half of 112 =
  21. 21.Double 39 =
  22. 22.Half of 64 =
  23. 23.Double 17 =
  24. 24.Double 57 =
  25. 25.Double 45 =
  26. 26.Double 74 =
  27. 27.Double 26 =
  28. 28.Half of 76 =
  29. 29.Half of 118 =
  30. 30.Double 51 =
  31. 31.Double 77 =
  32. 32.Double 86 =
  33. 33.Half of 184 =
  34. 34.Double 87 =
  35. 35.Double 82 =
  36. 36.Half of 168 =
  37. 37.Half of 26 =
  38. 38.Half of 106 =
  39. 39.Half of 42 =
  40. 40.Double 68 =

Answer key

  1. 69
  2. 11
  3. 96
  4. 86
  5. 94
  6. 168
  7. 182
  8. 61
  9. 64
  10. 124
  11. 26
  12. 62
  13. 146
  14. 66
  15. 162
  16. 76
  17. 74
  18. 50
  19. 47
  20. 56
  21. 78
  22. 32
  23. 34
  24. 114
  25. 90
  26. 148
  27. 52
  28. 38
  29. 59
  30. 102
  31. 154
  32. 172
  33. 92
  34. 174
  35. 164
  36. 84
  37. 13
  38. 53
  39. 21
  40. 136

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