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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 206 · 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 87 =
  2. 2.Half of 36 =
  3. 3.Half of 172 =
  4. 4.Double 22 =
  5. 5.Double 14 =
  6. 6.Double 37 =
  7. 7.Half of 44 =
  8. 8.Double 59 =
  9. 9.Double 25 =
  10. 10.Double 57 =
  11. 11.Double 68 =
  12. 12.Double 13 =
  13. 13.Double 91 =
  14. 14.Double 41 =
  15. 15.Double 83 =
  16. 16.Half of 34 =
  17. 17.Double 47 =
  18. 18.Double 81 =
  19. 19.Double 86 =
  20. 20.Half of 114 =
  21. 21.Double 89 =
  22. 22.Double 45 =
  23. 23.Half of 32 =
  24. 24.Double 32 =
  25. 25.Double 53 =
  26. 26.Double 73 =
  27. 27.Half of 152 =
  28. 28.Half of 94 =
  29. 29.Half of 142 =
  30. 30.Half of 22 =
  31. 31.Double 61 =
  32. 32.Half of 26 =
  33. 33.Double 12 =
  34. 34.Half of 38 =
  35. 35.Half of 92 =
  36. 36.Double 33 =
  37. 37.Half of 82 =
  38. 38.Double 31 =
  39. 39.Half of 118 =
  40. 40.Half of 62 =

Answer key

  1. 174
  2. 18
  3. 86
  4. 44
  5. 28
  6. 74
  7. 22
  8. 118
  9. 50
  10. 114
  11. 136
  12. 26
  13. 182
  14. 82
  15. 166
  16. 17
  17. 94
  18. 162
  19. 172
  20. 57
  21. 178
  22. 90
  23. 16
  24. 64
  25. 106
  26. 146
  27. 76
  28. 47
  29. 71
  30. 11
  31. 122
  32. 13
  33. 24
  34. 19
  35. 46
  36. 66
  37. 41
  38. 62
  39. 59
  40. 31

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