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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 729 · 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 98 =
  2. 2.Double 91 =
  3. 3.Half of 182 =
  4. 4.Double 51 =
  5. 5.Double 83 =
  6. 6.Half of 166 =
  7. 7.Double 32 =
  8. 8.Double 42 =
  9. 9.Half of 82 =
  10. 10.Double 36 =
  11. 11.Double 31 =
  12. 12.Half of 124 =
  13. 13.Double 25 =
  14. 14.Double 41 =
  15. 15.Half of 56 =
  16. 16.Half of 174 =
  17. 17.Half of 58 =
  18. 18.Half of 18 =
  19. 19.Half of 72 =
  20. 20.Half of 162 =
  21. 21.Half of 52 =
  22. 22.Double 73 =
  23. 23.Half of 198 =
  24. 24.Double 95 =
  25. 25.Half of 36 =
  26. 26.Half of 146 =
  27. 27.Double 94 =
  28. 28.Double 96 =
  29. 29.Double 71 =
  30. 30.Double 24 =
  31. 31.Double 26 =
  32. 32.Half of 78 =
  33. 33.Double 44 =
  34. 34.Double 23 =
  35. 35.Double 29 =
  36. 36.Half of 158 =
  37. 37.Half of 132 =
  38. 38.Double 56 =
  39. 39.Half of 152 =
  40. 40.Half of 194 =

Answer key

  1. 49
  2. 182
  3. 91
  4. 102
  5. 166
  6. 83
  7. 64
  8. 84
  9. 41
  10. 72
  11. 62
  12. 62
  13. 50
  14. 82
  15. 28
  16. 87
  17. 29
  18. 9
  19. 36
  20. 81
  21. 26
  22. 146
  23. 99
  24. 190
  25. 18
  26. 73
  27. 188
  28. 192
  29. 142
  30. 48
  31. 52
  32. 39
  33. 88
  34. 46
  35. 58
  36. 79
  37. 66
  38. 112
  39. 76
  40. 97

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