Posted by **Noah** on Wednesday, January 23, 2008 at 10:00am.

How is doing operations (adding, subtracting, multiplying, and dividing) with rational expressions similar to or different from doing operations with fractions?

- Algebra -
**drwls**, Wednesday, January 23, 2008 at 10:42am
You have both numerators and denominators to deal with. Very specific new rules apply. You need common denominators to add and subtract, and the operations are performed on the numerators only. In multiplication of two fractions, both numerators and denominators are multiplied separately. When dividing by a/b, multiply by b/a instead.

## Answer this Question

## Related Questions

- algebra - How is doing operations (adding, subtracting, multiplying, and ...
- algerbra operations - How is doing operations (adding, subtracting, multiplying...
- algebra - how is doing operations, adding, subtracting, multiplying and dividing...
- algebra - How is doing operations—adding, subtracting, multiplying, and ...
- Algebra 1B - How is doing operations (adding, subtracting, multiplying, and ...
- college - How is doing operations (adding, subtracting, multiplying, and ...
- Alegreba - How is doing operations (adding, subtracting, multiplying, and ...
- math - How is doing operations (adding, subtracting, multiplying, and dividing) ...
- Algebra 2/ Radicals - Why is it important to simplify radical expressions before...
- algebra - Why is it important to simplify radical expressions before adding or ...