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

7-137.

Evaluate each expression.  

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

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    When you subtract a negative, you add its opposite.

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    Find a common denominator.

    See part (b).

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    Multiply the numerators together and the denominators together.

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

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