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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 281 · 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 122 =
  2. 2.Double 31 =
  3. 3.Half of 62 =
  4. 4.Half of 92 =
  5. 5.Double 58 =
  6. 6.Double 27 =
  7. 7.Double 25 =
  8. 8.Double 23 =
  9. 9.Half of 182 =
  10. 10.Double 65 =
  11. 11.Half of 16 =
  12. 12.Half of 64 =
  13. 13.Double 61 =
  14. 14.Half of 32 =
  15. 15.Half of 34 =
  16. 16.Half of 44 =
  17. 17.Half of 56 =
  18. 18.Half of 142 =
  19. 19.Double 81 =
  20. 20.Half of 78 =
  21. 21.Half of 14 =
  22. 22.Double 53 =
  23. 23.Half of 178 =
  24. 24.Double 21 =
  25. 25.Double 49 =
  26. 26.Double 44 =
  27. 27.Double 19 =
  28. 28.Half of 194 =
  29. 29.Half of 144 =
  30. 30.Double 39 =
  31. 31.Half of 12 =
  32. 32.Double 52 =
  33. 33.Half of 152 =
  34. 34.Half of 168 =
  35. 35.Half of 108 =
  36. 36.Double 42 =
  37. 37.Double 47 =
  38. 38.Half of 114 =
  39. 39.Half of 186 =
  40. 40.Half of 102 =

Answer key

  1. 61
  2. 62
  3. 31
  4. 46
  5. 116
  6. 54
  7. 50
  8. 46
  9. 91
  10. 130
  11. 8
  12. 32
  13. 122
  14. 16
  15. 17
  16. 22
  17. 28
  18. 71
  19. 162
  20. 39
  21. 7
  22. 106
  23. 89
  24. 42
  25. 98
  26. 88
  27. 38
  28. 97
  29. 72
  30. 78
  31. 6
  32. 104
  33. 76
  34. 84
  35. 54
  36. 84
  37. 94
  38. 57
  39. 93
  40. 51

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