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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 489 · 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 68 =
  2. 2.Double 31 =
  3. 3.Half of 34 =
  4. 4.Double 25 =
  5. 5.Half of 184 =
  6. 6.Half of 166 =
  7. 7.Half of 32 =
  8. 8.Double 51 =
  9. 9.Half of 106 =
  10. 10.Half of 44 =
  11. 11.Half of 82 =
  12. 12.Double 46 =
  13. 13.Half of 194 =
  14. 14.Double 92 =
  15. 15.Double 98 =
  16. 16.Half of 88 =
  17. 17.Double 89 =
  18. 18.Half of 126 =
  19. 19.Half of 14 =
  20. 20.Double 26 =
  21. 21.Half of 136 =
  22. 22.Half of 158 =
  23. 23.Double 69 =
  24. 24.Half of 108 =
  25. 25.Double 93 =
  26. 26.Half of 102 =
  27. 27.Double 97 =
  28. 28.Double 65 =
  29. 29.Double 33 =
  30. 30.Half of 46 =
  31. 31.Double 87 =
  32. 32.Half of 132 =
  33. 33.Double 74 =
  34. 34.Half of 172 =
  35. 35.Double 48 =
  36. 36.Half of 36 =
  37. 37.Double 15 =
  38. 38.Half of 178 =
  39. 39.Double 47 =
  40. 40.Half of 188 =

Answer key

  1. 136
  2. 62
  3. 17
  4. 50
  5. 92
  6. 83
  7. 16
  8. 102
  9. 53
  10. 22
  11. 41
  12. 92
  13. 97
  14. 184
  15. 196
  16. 44
  17. 178
  18. 63
  19. 7
  20. 52
  21. 68
  22. 79
  23. 138
  24. 54
  25. 186
  26. 51
  27. 194
  28. 130
  29. 66
  30. 23
  31. 174
  32. 66
  33. 148
  34. 86
  35. 96
  36. 18
  37. 30
  38. 89
  39. 94
  40. 94

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