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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 745 · 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 41 =
  2. 2.Half of 142 =
  3. 3.Half of 128 =
  4. 4.Half of 182 =
  5. 5.Double 61 =
  6. 6.Half of 184 =
  7. 7.Half of 42 =
  8. 8.Double 49 =
  9. 9.Half of 92 =
  10. 10.Double 92 =
  11. 11.Double 31 =
  12. 12.Half of 62 =
  13. 13.Half of 82 =
  14. 14.Double 71 =
  15. 15.Half of 124 =
  16. 16.Double 21 =
  17. 17.Double 47 =
  18. 18.Half of 156 =
  19. 19.Half of 132 =
  20. 20.Double 36 =
  21. 21.Half of 96 =
  22. 22.Double 91 =
  23. 23.Half of 66 =
  24. 24.Double 43 =
  25. 25.Double 56 =
  26. 26.Half of 44 =
  27. 27.Double 12 =
  28. 28.Double 62 =
  29. 29.Double 81 =
  30. 30.Half of 112 =
  31. 31.Half of 146 =
  32. 32.Double 48 =
  33. 33.Half of 22 =
  34. 34.Double 35 =
  35. 35.Half of 72 =
  36. 36.Half of 118 =
  37. 37.Double 46 =
  38. 38.Double 54 =
  39. 39.Half of 134 =
  40. 40.Half of 126 =

Answer key

  1. 82
  2. 71
  3. 64
  4. 91
  5. 122
  6. 92
  7. 21
  8. 98
  9. 46
  10. 184
  11. 62
  12. 31
  13. 41
  14. 142
  15. 62
  16. 42
  17. 94
  18. 78
  19. 66
  20. 72
  21. 48
  22. 182
  23. 33
  24. 86
  25. 112
  26. 22
  27. 24
  28. 124
  29. 162
  30. 56
  31. 73
  32. 96
  33. 11
  34. 70
  35. 36
  36. 59
  37. 92
  38. 108
  39. 67
  40. 63

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