42
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There are 42 eggs in three and a half dozen. To calculate this, you first determine how many eggs are in one dozen, which is 12. Then you multiply 12 by 3 to get the total number of eggs in three dozen, which is 36. Finally, you add half of a dozen, which is 6, to get a total of 42 eggs in three and a half dozen.
Two and a half dozen is equal to 30. Each dozen is 12, and a half a dozen is 6, so the equation you can use to figure that out is 12 x 2 + 6 = 30.
dozen = 12 half doz. = 6 12 x 3 + 6 = 42
There are 12 in one dozen. Therefore, 3.5 dozen rolls is equal to 3.5 x 12 = 42 rolls. Unless of course, it's a baker's dozen!
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