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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 721 · 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.Half of 38 =
  3. 3.Double 34 =
  4. 4.Double 61 =
  5. 5.Double 81 =
  6. 6.Double 28 =
  7. 7.Half of 152 =
  8. 8.Double 54 =
  9. 9.Double 31 =
  10. 10.Half of 42 =
  11. 11.Double 62 =
  12. 12.Double 71 =
  13. 13.Half of 88 =
  14. 14.Double 36 =
  15. 15.Half of 156 =
  16. 16.Double 78 =
  17. 17.Half of 82 =
  18. 18.Half of 26 =
  19. 19.Double 16 =
  20. 20.Half of 24 =
  21. 21.Half of 58 =
  22. 22.Half of 178 =
  23. 23.Double 39 =
  24. 24.Double 45 =
  25. 25.Double 87 =
  26. 26.Double 23 =
  27. 27.Double 98 =
  28. 28.Double 72 =
  29. 29.Double 52 =
  30. 30.Double 95 =
  31. 31.Half of 112 =
  32. 32.Double 74 =
  33. 33.Double 13 =
  34. 34.Double 67 =
  35. 35.Double 68 =
  36. 36.Half of 188 =
  37. 37.Half of 154 =
  38. 38.Half of 194 =
  39. 39.Half of 72 =
  40. 40.Half of 54 =

Answer key

  1. 61
  2. 19
  3. 68
  4. 122
  5. 162
  6. 56
  7. 76
  8. 108
  9. 62
  10. 21
  11. 124
  12. 142
  13. 44
  14. 72
  15. 78
  16. 156
  17. 41
  18. 13
  19. 32
  20. 12
  21. 29
  22. 89
  23. 78
  24. 90
  25. 174
  26. 46
  27. 196
  28. 144
  29. 104
  30. 190
  31. 56
  32. 148
  33. 26
  34. 134
  35. 136
  36. 94
  37. 77
  38. 97
  39. 36
  40. 27

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