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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 590 · 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 28 =
  2. 2.Half of 52 =
  3. 3.Double 36 =
  4. 4.Half of 104 =
  5. 5.Double 35 =
  6. 6.Double 71 =
  7. 7.Half of 154 =
  8. 8.Double 97 =
  9. 9.Half of 138 =
  10. 10.Double 18 =
  11. 11.Double 85 =
  12. 12.Double 84 =
  13. 13.Double 24 =
  14. 14.Double 73 =
  15. 15.Half of 82 =
  16. 16.Half of 156 =
  17. 17.Double 11 =
  18. 18.Half of 146 =
  19. 19.Half of 186 =
  20. 20.Half of 44 =
  21. 21.Double 39 =
  22. 22.Double 64 =
  23. 23.Half of 182 =
  24. 24.Double 16 =
  25. 25.Double 26 =
  26. 26.Double 49 =
  27. 27.Double 28 =
  28. 28.Half of 152 =
  29. 29.Double 23 =
  30. 30.Half of 176 =
  31. 31.Half of 142 =
  32. 32.Half of 112 =
  33. 33.Half of 106 =
  34. 34.Double 81 =
  35. 35.Double 68 =
  36. 36.Half of 16 =
  37. 37.Half of 88 =
  38. 38.Double 69 =
  39. 39.Double 52 =
  40. 40.Double 77 =

Answer key

  1. 14
  2. 26
  3. 72
  4. 52
  5. 70
  6. 142
  7. 77
  8. 194
  9. 69
  10. 36
  11. 170
  12. 168
  13. 48
  14. 146
  15. 41
  16. 78
  17. 22
  18. 73
  19. 93
  20. 22
  21. 78
  22. 128
  23. 91
  24. 32
  25. 52
  26. 98
  27. 56
  28. 76
  29. 46
  30. 88
  31. 71
  32. 56
  33. 53
  34. 162
  35. 136
  36. 8
  37. 44
  38. 138
  39. 104
  40. 154

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