Exercise 8 Page 527

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

29/30

Practice makes perfect

When adding or subtracting fractions, they should have the same denominator. In this exercise, we have three fractions with different denominators. 9/10 - 4/15 + 1/3Since 30 is a multiple of 10, 15, and 3, we can multiply numerators and denominators of these fractions by 3, 2, and 10, to create a common denominator.

9/10-4/15+1/3

ExpandFrac

a/b=a * 3/b * 3

9 * 3/10 * 3-4/15+1/3

ExpandFrac

a/b=a * 2/b * 2

9 * 3/10 * 3-4 * 2/15 * 2+1/3

ExpandFrac

a/b=a * 10/b * 10

9 * 3/10 * 3-4 * 2/15 * 2+1 * 10/3 * 10

Multiply

27/30-8/30+10/30