5 Slides • 4 Questions

Add and Subtract Rational Expressions

by Ashley Dugas

2

Multiple Choice

What would be the common denominator for this expression?

1

$3a$

2

$2$

3

$6a$

4

$5a$

3

When in doubt...

Multiply the denominators to create a common denominator

4

Multiple Select

What would be the common denominator for this expression?

1

$6b^2$

2

$2b$

3

$6b$

4

$2b^2$

5

Which is best?

When in doubt, take the product of the two denominators. You can always simplify later.

Work smart! Stop and see if the expressions can be simplified before working.

6

Multiple Choice

What would be the common denominator for this expression?

1

$2x^2$

2

$2x$

3

$2x+1$

4

Doesn't exist

7

Rewrite Fractions

Any constant or term can be written with a denominator of 1.

Then to find the common denominator, multiply the original denominators.

8

Multiple Choice

What would be the common denominator for this rational expression?

1

$z$

2

$z\left(z+2\right)$

3

$z^2+2$

4

$z^2$

9

When in doubt...

Multiply the denominators to create a common denominator

HINT! Leave denominator in factored form! It makes it easier to simplify if need be.

Add and Subtract Rational Expressions

by Ashley Dugas

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Adding or Subtracting Rational Expressions

Add and Subtract Rational Expressions

​When in doubt...

​Multiply the denominators to create a common denominator

​Which is best?

​Rewrite Fractions

​When in doubt...

​Multiply the denominators to create a common denominator

Add and Subtract Rational Expressions

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Mathematics

When in doubt...

Multiply the denominators to create a common denominator

Which is best?

Rewrite Fractions

When in doubt...

Multiply the denominators to create a common denominator