1/3 cup of flour is used in 5 dinner rolls. How many cups of flour are needed to make 3 dozen rolls?
2 answers:
5 = 1/3 cup flour
3 dozen = 36 rolls
12 x 3 = 36
1/3 x 36 = 12
3 dozen=3·12=36
Use cross multiplication
1/3·36=5x
12=5x
12/5=5x/5
x=12/5 or 2 2/5 or 2.4
12/5 or 2 2/5 cups of flour is needed to make 3 dozen rolls
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