### Home > CC2MN > Chapter 7 > Lesson 7.2.7 > Problem 7-137

7-137.

Evaluate each expression.

Remember to line up the decimal points when adding or subtracting numbers with decimals.

When you subtract a negative, you add its opposite.

Find a common denominator.

See part (b).

Multiply the numerators together and the denominators together.

When you multiply numbers with decimals, you do not need to line up the decimal points.

Remember, a negative number multiplied by a positive number is always a negative number.