Sandra needs #2 3/4# cups of flour for one kind of cookie and #3 3/8# cups for another kind. How much would she need for both kinds?

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Answer 1 · 2018-03-10T00:05:49

#6 1/8#

We can add the numbers together to find out.

#2 3/4+3 3/8#

One way we can do this is to separate out the whole numbers from the fractions:

#2+3/4+3+3/8#

#2+3+3/4+3/8#

We know that #2+3=5# so that's done. Let's work with the fractions now.

To add the fractions, we need the denominators to be the same:

#5+3/4(1)+3/8#

#5+3/4(2/2)+3/8#

#5+6/8+3/8#

#5+9/8#

Notice that #9/8 = 1 1/8#

#5+1+1/8=6 1/8#