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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 404 · 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 63 =
  3. 3.Double 58 =
  4. 4.Double 65 =
  5. 5.Half of 92 =
  6. 6.Double 79 =
  7. 7.Double 68 =
  8. 8.Double 35 =
  9. 9.Half of 194 =
  10. 10.Double 69 =
  11. 11.Half of 16 =
  12. 12.Half of 84 =
  13. 13.Half of 36 =
  14. 14.Double 71 =
  15. 15.Double 49 =
  16. 16.Half of 48 =
  17. 17.Half of 176 =
  18. 18.Double 37 =
  19. 19.Half of 66 =
  20. 20.Half of 46 =
  21. 21.Double 52 =
  22. 22.Half of 78 =
  23. 23.Double 32 =
  24. 24.Half of 126 =
  25. 25.Double 91 =
  26. 26.Double 81 =
  27. 27.Double 16 =
  28. 28.Half of 182 =
  29. 29.Double 82 =
  30. 30.Double 51 =
  31. 31.Half of 148 =
  32. 32.Half of 42 =
  33. 33.Double 25 =
  34. 34.Half of 12 =
  35. 35.Half of 62 =
  36. 36.Double 43 =
  37. 37.Double 41 =
  38. 38.Half of 98 =
  39. 39.Half of 116 =
  40. 40.Half of 54 =

Answer key

  1. 36
  2. 126
  3. 116
  4. 130
  5. 46
  6. 158
  7. 136
  8. 70
  9. 97
  10. 138
  11. 8
  12. 42
  13. 18
  14. 142
  15. 98
  16. 24
  17. 88
  18. 74
  19. 33
  20. 23
  21. 104
  22. 39
  23. 64
  24. 63
  25. 182
  26. 162
  27. 32
  28. 91
  29. 164
  30. 102
  31. 74
  32. 21
  33. 50
  34. 6
  35. 31
  36. 86
  37. 82
  38. 49
  39. 58
  40. 27

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