Operations with Rational Numbers

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When adding and subtracting rational expressions, my first step should be to:

• Combine like terms in the numerators.
• Determine a Least Common Denominator.
• Factor all of the numerators and all of the denominators.
• Change the operator to multiplication and reciprocate the second fraction.

When adding and subtracting, I should ___________ combine like terms in the denominator.

• Always
• Sometimes
• Never
• I'm Not Sure.

Perform the operation

• A
• B
• C
• D

What mathematical operations can be done to rational expressions?

• All mathematical operations.

• Some mathematical operations.

Find the least common denominator of the expression

• 18
• 6x
• 3xy
• 6xy

Simplify the expression

• 6x / 20xy
• 3 / 10y
• (6x+1) / (20xy)
• 3 / 20xy