Expressions

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (such as +, -, *, /) that represents a value.

Tags

CCSS.6.EE.A.2B

Front

What does it mean to simplify an expression?

Back

To simplify an expression means to combine like terms and reduce it to its simplest form.

Tags

CCSS.7.EE.A.1

Front

What are like terms?

Back

Like terms are terms that have the same variable raised to the same power. For example, 3x and 5x are like terms.

Tags

CCSS.6.EE.A.2B

Front

What is the distributive property?

Back

The distributive property states that a(b + c) = ab + ac, meaning you can distribute a factor across a sum.

Tags

CCSS.6.EE.A.3

Front

How do you combine like terms?

Back

To combine like terms, add or subtract the coefficients of the terms that have the same variable. For example, 3x + 5x = 8x.

Tags

CCSS.7.EE.A.1

Front

What is the coefficient in an expression?

Back

The coefficient is the numerical factor that multiplies a variable in an expression. For example, in 4x, 4 is the coefficient.

Tags

CCSS.6.EE.A.2B

Front

What is the perimeter of a triangle?

Back

The perimeter of a triangle is the sum of the lengths of all its sides.

Tags

CCSS.3.MD.D.8

Front

How do you find the length of one side of an equilateral triangle?

Back

To find the length of one side of an equilateral triangle, divide the perimeter by 3.

Tags

CCSS.3.MD.D.8

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting the variables with numbers.

Tags

CCSS.6.EE.A.2C

Front

What is the result of -12n - (-13n)?

Back

The result is n.

Tags

CCSS.7.EE.A.1