Posted on April 27, 2010.
Express the number of pencils using a system based on tens and gross? A bookstore ordered a total of 1130 pencils.
Bookstore ordered that
_____gross
_____dozen
_____units
144 pencils in a gross.
So 1130/144 = 7.8 .. -> 7 Gross
7 * 144 = 1008, 122 left.
122 is 10 dozen. (120), and two left.
made within 7 Gross, 10 dozen, 2 units.
1130, 94.2, 95
A gross is 144 pencils.
A dozen is 12 pencils
A unit is a pencil.
Divide 1130 by 144. The part of the quotient is the number of large.
Subtract that many large from 1130. The rest will be a number that is smaller than 144.
Divide the remainder by 12. The part of the quotient is the number of dozens.
Subtract the number of dozens. The remainder of this period will be a number less than 12. These are the units.
