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Pearson Algebra 1 Common Core, 2011 View details

5. Adding and Subtracting Real Numbers

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Exercise 49 Page 35

Find a common denominator.

- 1/12

Practice makes perfect

We are asked to simplify the given expression. 1-1/2-1/3-1/4 When adding fractions they must have the same denominator. Since 2, 3, and 4 are all factors of 12, we can use 12 as our common denominator.

1-1/2-1/3-1/4

OneToFrac

Rewrite 1 as 12/12

12/12-1/2-1/3-1/4

ExpandFrac

a/b=a * 6/b * 6

12/12-6/12-1/3-1/4

ExpandFrac

a/b=a * 4/b * 4

12/12-6/12-4/12-1/4

ExpandFrac

a/b=a * 3/b * 3