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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 772 · 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 22 =
  2. 2.Double 31 =
  3. 3.Half of 154 =
  4. 4.Half of 18 =
  5. 5.Double 62 =
  6. 6.Double 21 =
  7. 7.Double 18 =
  8. 8.Half of 24 =
  9. 9.Half of 44 =
  10. 10.Double 83 =
  11. 11.Double 45 =
  12. 12.Half of 132 =
  13. 13.Double 43 =
  14. 14.Double 16 =
  15. 15.Double 42 =
  16. 16.Half of 62 =
  17. 17.Half of 112 =
  18. 18.Half of 162 =
  19. 19.Half of 156 =
  20. 20.Double 61 =
  21. 21.Double 89 =
  22. 22.Half of 152 =
  23. 23.Double 68 =
  24. 24.Half of 72 =
  25. 25.Double 85 =
  26. 26.Half of 48 =
  27. 27.Double 44 =
  28. 28.Half of 92 =
  29. 29.Half of 172 =
  30. 30.Half of 122 =
  31. 31.Half of 58 =
  32. 32.Double 63 =
  33. 33.Double 41 =
  34. 34.Double 71 =
  35. 35.Half of 144 =
  36. 36.Double 33 =
  37. 37.Double 36 =
  38. 38.Double 35 =
  39. 39.Half of 26 =
  40. 40.Double 98 =

Answer key

  1. 11
  2. 62
  3. 77
  4. 9
  5. 124
  6. 42
  7. 36
  8. 12
  9. 22
  10. 166
  11. 90
  12. 66
  13. 86
  14. 32
  15. 84
  16. 31
  17. 56
  18. 81
  19. 78
  20. 122
  21. 178
  22. 76
  23. 136
  24. 36
  25. 170
  26. 24
  27. 88
  28. 46
  29. 86
  30. 61
  31. 29
  32. 126
  33. 82
  34. 142
  35. 72
  36. 66
  37. 72
  38. 70
  39. 13
  40. 196

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