Evaluating Algebraic Expressions

Front

What is an algebraic expression?

Back

An algebraic expression is a mathematical phrase that can include numbers, variables, and operation symbols. For example, 5m + 9n is an algebraic expression.

Tags

CCSS.6.EE.A.2B

Front

How do you evaluate an algebraic expression?

Back

To evaluate an algebraic expression, substitute the values of the variables into the expression and perform the operations according to the order of operations.

Tags

CCSS.6.EE.A.2C

Front

What is the order of operations in mathematics?

Back

The order of operations is a set of rules that determines the sequence in which calculations are performed. It is often remembered by the acronym PEMDAS: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

Tags

CCSS.7.NS.A.3

Front

Evaluate: 5m + 9n if m = -7 and n = 4

Back

1

Tags

CCSS.6.EE.A.2C

Front

Evaluate: -7w^2 + 2w if w = -4

Back

-120

Tags

CCSS.6.EE.A.2C

Front

Back

8

Tags

CCSS.6.EE.A.2C

Front

Evaluate: 4(p - r) if p = 6 and r = -2

Back

32

Tags

CCSS.6.EE.A.2C

Front

Evaluate: 12x ÷ 4y if x = -8 and y = 3

Back

-72

Tags

CCSS.6.EE.A.2C

Front

What is a variable in algebra?

Back

A variable is a symbol, often a letter, that represents an unknown value in an expression or equation. For example, in the expression 5m + 9n, m and n are variables.

Tags

CCSS.6.EE.A.2B

Front

What does it mean to substitute in algebra?

Back

To substitute means to replace a variable in an expression with a specific value. For example, substituting m = -7 in 5m + 9n means replacing m with -7.

Tags

CCSS.6.EE.A.2C