3rd Periodical Exam - Grade 8

Among the steps below, what should be done first when adding or subtracting rational algebraic expressions?

• Multiply the numerators together

• Multiply the denominators together

• Factor the expressions

• Reduce the fractions to lowest terms

In multiplying rational algebraic expressions, what should be done first?

• Multiply the numerators together

• Multiply the denominators together

• Factor both expressions

• Reduce the fractions to lowest terms

After factoring, what should be done next when dividing rational algebraic expressions?

• Rewrite the divisor to its reciprocal and proceed to multiplication

• Multiply the numerators together

• Multiply the denominators together

• Factor both expressions

When adding or subtracting rational algebraic expressions, what should you do if the denominators are different?

• Leave the denominators as is

• Find the least common denominator

• Multiply the denominators together

• Reduce the fractions to lowest terms

When multiplying rational algebraic expressions, what should you do if there are common factors in the numerators and denominators?

• Cancel the common factors

• Multiply the common factors together

• Add the common factors together

• Leave the common factors as is

When dividing rational algebraic expressions, what should you do if, after multiplying the expressions in the numerator and denominator of the first expression to the reciprocal of the second expression, there are common factors in the numerators and denominators?

• Cancel the common factors

• Multiply the common factors together

• Add the common factors together

• Leave the common factors as is

When adding or subtracting similar rational algebraic expressions, what should you do with the numerators after factoring?

• Add or subtract them

• Multiply them

• Divide them

• Factor them

When multiplying rational algebraic expressions, what should you do with the numerators?

• Add or subtract them

• Multiply them

• Divide them

• Factor them

Which of the following is the correct way to add two rational algebraic expressions with unlike denominators?

• Determine the least common denominator and divide it to both denominators and then multiply the result to the numerators.

• Subtract the numerators of each expression and put the result over a common denominator.

• Add the numerators of each expression and put the result over a common denominator.

• Divide the numerators of each expression by their common denominator