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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 186 · 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 31 =
  2. 2.Half of 136 =
  3. 3.Double 46 =
  4. 4.Half of 122 =
  5. 5.Double 56 =
  6. 6.Double 92 =
  7. 7.Half of 26 =
  8. 8.Double 79 =
  9. 9.Half of 64 =
  10. 10.Double 18 =
  11. 11.Double 15 =
  12. 12.Double 34 =
  13. 13.Double 81 =
  14. 14.Double 72 =
  15. 15.Half of 24 =
  16. 16.Double 41 =
  17. 17.Half of 32 =
  18. 18.Half of 182 =
  19. 19.Double 33 =
  20. 20.Double 13 =
  21. 21.Double 71 =
  22. 22.Half of 104 =
  23. 23.Double 68 =
  24. 24.Double 51 =
  25. 25.Half of 46 =
  26. 26.Double 32 =
  27. 27.Double 48 =
  28. 28.Double 24 =
  29. 29.Double 97 =
  30. 30.Double 12 =
  31. 31.Double 22 =
  32. 32.Half of 112 =
  33. 33.Half of 14 =
  34. 34.Half of 28 =
  35. 35.Half of 52 =
  36. 36.Half of 178 =
  37. 37.Half of 22 =
  38. 38.Double 36 =
  39. 39.Double 99 =
  40. 40.Half of 72 =

Answer key

  1. 62
  2. 68
  3. 92
  4. 61
  5. 112
  6. 184
  7. 13
  8. 158
  9. 32
  10. 36
  11. 30
  12. 68
  13. 162
  14. 144
  15. 12
  16. 82
  17. 16
  18. 91
  19. 66
  20. 26
  21. 142
  22. 52
  23. 136
  24. 102
  25. 23
  26. 64
  27. 96
  28. 48
  29. 194
  30. 24
  31. 44
  32. 56
  33. 7
  34. 14
  35. 26
  36. 89
  37. 11
  38. 72
  39. 198
  40. 36

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