peter made 3 1/2 dozen cookies for a bake sale and used 7 7/8 cups of flour. How much flour is needed for one dozen cookies?
7 7/8 divided by 3.5 = ?
7 7/8 divided by 3 1/2 = 2.46
so about 2.5 cups of flour👍👍👍👍👍👍:-D:-D:-D;-);-);-)🤗🤗🤗🤗
X = the amount of flour needed
3 1/2x = 7 7/8
(divide by 3 1/2)
X = 63/28
(simplify)
X = 2 1/4 cups of flour
X = 3 full cups
U just divide 7 7/8 by by 3 1/2
To find out how much flour is needed for one dozen cookies, you can use division to calculate the amount of flour that Peter used for 3 1/2 dozen cookies.
Step 1: Convert the 3 1/2 dozen cookies to a mixed number.
3 1/2 can be converted to an improper fraction by multiplying the whole number (3) by the denominator (2) and adding the numerator (1), and then writing it as a fraction over the original denominator.
3 1/2 = (3 * 2 + 1)/2 = 7/2
Step 2: Multiply the amount of flour used for 3 1/2 dozen cookies by the reciprocal of the number of dozens to find out the amount of flour needed for one dozen cookies.
Recall that when dividing a fraction by another fraction, you multiply by its reciprocal.
(7 7/8) * (2/7) = (7/1) * (7/8) * (2/7) = 14/8 = 7/4
Step 3: Simplify the fraction, if possible.
7/4 can be simplified as follows:
7/4 = (7/1)/(4/1) = 7/4
Therefore, Peter needs 7/4 cups of flour for one dozen cookies.