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6-31.

Simplify each expression.  

Remember: When you are multiplying fractions, multiply the numerators together and the denominators together. When you are adding fractions, find the common denominator.

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    Can this fraction be reduced?

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    Make the expressions fractions greater than one, then find the common denominator.

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    Make the two numbers similar; make both numbers fractions or make both numbers decimals. Be careful of the signs.