Exercise 10 Page 179

To add or subtract fractions, they need to have the same denominator.

- 11/24

When adding or subtracting fractions, they should have the same denominator. In this exercise, we have two fractions with different denominators. 5/12 - 7/8Since 24 is a multiple of 12 and 8, we can start by multiplying both the numerator and denominator of 512 by 2 to create a common denominator.

5/12-7/8

ExpandFrac

a/b=a * 2/b * 2

5* 2/12* 2-7/8

Multiply

10/24-7/8

ExpandFrac

a/b=a * 3/b * 3

10/24-7* 3/8* 3

Multiply

10/24-21/24

Now that we have a common denominator, we can proceed to simplifying the expression.