2006-07-09 20:19:28 · 12 answers · asked by Brent M 1 in Science & Mathematics ➔ Mathematics
80 cents
2006-07-09 20:22:12 · answer #1 · answered by aussie_east_ender 2 · 0⤊ 0⤋
First of all, a dozen=12
Now,cost of 3 pencils=20cents
Therefor,cost of 12 pencils=(20/3)x12
=80 cents Ans.
2006-07-10 00:19:46 · answer #2 · answered by chill 2 · 0⤊ 0⤋
The KEY to handling this type of problem is to first calculate the price for 1 pencil. Then you'd multiply that price by 12, which would give you how much it'll cost to buy a dozen.
To get the price for a single pencil, you simply divide the 20 cents (0.20) by 3, giving you 0.20 / 3 = 0.07 (7 cents each). Now we'd multiply this 0.07 by 12 to get the price per dozen, which comes out to 0.84 (84 cents).
2006-07-10 14:37:44 · answer #3 · answered by msoexpert 6 · 0⤊ 0⤋
Cost prise/pencil=20/3 cents.
Cost prise/12 pencil= ?
Cost prise/12 pencil=12*20/3=80 cents.
Cost of a dozen of these pencils =80 cents.
2006-07-09 20:31:02 · answer #4 · answered by Anonymous · 0⤊ 0⤋
80 cents. Divide 12 by 3 to get 4. Then multiply 4 by 20 and get 80.
2006-07-09 20:24:28 · answer #5 · answered by Eric X 5 · 0⤊ 0⤋
Obtain what each pencil costs and then see what a dozen will cost:
$0.20 / 3 pencils x 12 pencils = $0.20 x 4 = $0.80
Note: the 'pencils' above will cancel each other (one in the numerator and one in the denominator), leaving cost only and... 12/3 = 4.
2006-07-09 20:31:24 · answer #6 · answered by Retainer Nut 2 · 0⤊ 0⤋
80 cents
2006-07-09 21:45:47 · answer #7 · answered by PunkGreen1829 4 · 0⤊ 0⤋
80 cents
2006-07-09 20:24:07 · answer #8 · answered by Wala 2 · 0⤊ 0⤋
80---and 2 dozen 160 lol
2006-07-09 20:23:59 · answer #9 · answered by Anonymous · 0⤊ 0⤋
80 cents.
2006-07-09 20:31:54 · answer #10 · answered by maaash 2 · 0⤊ 0⤋