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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 461 · 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 13 =
  2. 2.Half of 62 =
  3. 3.Double 17 =
  4. 4.Double 51 =
  5. 5.Double 16 =
  6. 6.Double 33 =
  7. 7.Double 93 =
  8. 8.Half of 96 =
  9. 9.Half of 184 =
  10. 10.Double 66 =
  11. 11.Double 38 =
  12. 12.Half of 32 =
  13. 13.Double 81 =
  14. 14.Half of 42 =
  15. 15.Half of 114 =
  16. 16.Half of 156 =
  17. 17.Half of 134 =
  18. 18.Double 49 =
  19. 19.Double 26 =
  20. 20.Half of 82 =
  21. 21.Double 57 =
  22. 22.Double 27 =
  23. 23.Double 86 =
  24. 24.Half of 144 =
  25. 25.Double 96 =
  26. 26.Double 12 =
  27. 27.Double 44 =
  28. 28.Double 41 =
  29. 29.Double 72 =
  30. 30.Double 18 =
  31. 31.Double 87 =
  32. 32.Double 68 =
  33. 33.Half of 176 =
  34. 34.Double 92 =
  35. 35.Half of 196 =
  36. 36.Half of 52 =
  37. 37.Double 61 =
  38. 38.Half of 154 =
  39. 39.Double 47 =
  40. 40.Half of 72 =

Answer key

  1. 26
  2. 31
  3. 34
  4. 102
  5. 32
  6. 66
  7. 186
  8. 48
  9. 92
  10. 132
  11. 76
  12. 16
  13. 162
  14. 21
  15. 57
  16. 78
  17. 67
  18. 98
  19. 52
  20. 41
  21. 114
  22. 54
  23. 172
  24. 72
  25. 192
  26. 24
  27. 88
  28. 82
  29. 144
  30. 36
  31. 174
  32. 136
  33. 88
  34. 184
  35. 98
  36. 26
  37. 122
  38. 77
  39. 94
  40. 36

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