Topics
5. Rational Functions & Expressions
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Math 3

5.02 Adding and subtracting rational expressions

Lesson
Practice

Interactive practice questions

Find the least common denominator for this pair of algebraic fractions:

$\frac{s}{3}$s3​ and $\frac{s}{9}$s9​

Easy
< 1min

Find the least common denominator for this pair of algebraic fractions:

$\frac{a}{2}$a2​ and $\frac{b}{3}$b3​

Easy
< 1min

In an upcoming election, it is anticipated that the number of men who vote, $x$x, will be greater than the number of women who vote, $y$y.

Each expression below represents the expected number of people who will NOT vote in two different counties.

Easy
< 1min

Find the least common denominator for this pair of algebraic fractions:

$\frac{1}{18h}$118h​ and $\frac{1}{9h}$19h​

Easy
< 1min
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Outcomes

A-SSE.1^

Interpret expressions that represent a quantity in terms of its context. ^Limited to polynomial and rational functions.

A-SSE.1.a^

Interpret parts of an expression, such as terms, factors, and coefficients. ^Limited to polynomial and rational functions.

A-SSE.1.b^

Interpret complicated expressions by viewing one or more of their parts as a single entity. ^Limited to polynomial and rational functions.

A-SSE.2^

Use the structure of an expression to identify ways to rewrite it. ^Limited to polynomial and rational functions.

A-APR.7

(+) Understand that rational expressions form a system analogous to the rational numbers, closed under addition, subtraction, multiplication, and division by a nonzero rational expression; add, subtract, multiply, and divide rational expressions. [Linear and quadratic denominators]

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