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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 97 · 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 72 =
  2. 2.Double 35 =
  3. 3.Double 51 =
  4. 4.Double 42 =
  5. 5.Half of 18 =
  6. 6.Half of 102 =
  7. 7.Half of 46 =
  8. 8.Double 23 =
  9. 9.Double 81 =
  10. 10.Half of 96 =
  11. 11.Half of 196 =
  12. 12.Half of 138 =
  13. 13.Double 75 =
  14. 14.Double 99 =
  15. 15.Half of 22 =
  16. 16.Half of 32 =
  17. 17.Double 71 =
  18. 18.Half of 156 =
  19. 19.Double 54 =
  20. 20.Double 93 =
  21. 21.Double 37 =
  22. 22.Double 96 =
  23. 23.Half of 182 =
  24. 24.Double 21 =
  25. 25.Double 77 =
  26. 26.Double 55 =
  27. 27.Double 44 =
  28. 28.Double 15 =
  29. 29.Half of 58 =
  30. 30.Half of 168 =
  31. 31.Half of 126 =
  32. 32.Double 82 =
  33. 33.Half of 188 =
  34. 34.Double 33 =
  35. 35.Double 91 =
  36. 36.Half of 152 =
  37. 37.Half of 144 =
  38. 38.Double 19 =
  39. 39.Half of 132 =
  40. 40.Half of 122 =

Answer key

  1. 36
  2. 70
  3. 102
  4. 84
  5. 9
  6. 51
  7. 23
  8. 46
  9. 162
  10. 48
  11. 98
  12. 69
  13. 150
  14. 198
  15. 11
  16. 16
  17. 142
  18. 78
  19. 108
  20. 186
  21. 74
  22. 192
  23. 91
  24. 42
  25. 154
  26. 110
  27. 88
  28. 30
  29. 29
  30. 84
  31. 63
  32. 164
  33. 94
  34. 66
  35. 182
  36. 76
  37. 72
  38. 38
  39. 66
  40. 61

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