Exercise 7 Page 527

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

1/18

Practice makes perfect

When adding or subtracting fractions, they should have the same denominator. In this exercise, we have three fractions with different denominators. 8/9 - 7/6 + 1/3Since 18 is a multiple of 9, 6, and 3, we can multiply numerators and denominators of these fractions by 2, 3, and 6, to create a common denominator.

8/9-7/6+1/3

ExpandFrac

a/b=a * 2/b * 2

8 * 2/9 * 2-7/6+1/3

ExpandFrac

a/b=a * 3/b * 3

8 * 2/9 * 2-7 * 3/6 * 3+1/3

ExpandFrac

a/b=a * 6/b * 6

8 * 2/9 * 2-7 * 3/6 * 3+1 * 6/3 * 6

Multiply

16/18-21/18+6/18