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4 7/10 + 6/8 Fractions please help cant solve. used two methods but answer isnt the same as the answer page from the book

2 Answers

2 votes

First, you have to find the common denominator.

It is 40.

But if we change the denominator, you have to change the numerator as well.

We multiplied 10 by 4 to get to 40, so we multiply 7 by 4.


(28)/(40)

We multiplied 8 by 5 to get to 40, so we do the same to 6:


(30)/(40)

Now add them:


(28)/(40) +(30)/(40)

We get:

58/40

1+18/40 is my answer...

User Paul Denisevich
by
7.9k points
5 votes

Answer:

5 9/20

Explanation:

4 7/10 + 6/8

Simplify the fractions by dividing the second top and bottom by 2

4 7/10 + 3/4

Getting a common denominator of 20

4 7/10 *2/2 + 3/4 * 5/5

4 14/20 + 15/20

4 29/20

4 + 20/20 + 9/20

4+1+9/20

5 9/20

User Wali
by
7.3k points

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