Evaluating 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 evaluate an expression?

Back

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

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 dictates the sequence in which calculations are performed: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right) - often abbreviated as PEMDAS.

Tags

CCSS.7.NS.A.3

Front

Evaluate the expression: 9a - ab + 5b when a = 2 and b = 7.

Back

39

Tags

CCSS.6.EE.A.2C

Front

Evaluate the expression: 2x(3x - y)² when x = 3 and y = 5.

Back

96

Tags

CCSS.6.EE.A.2C

Front

Simplify the expression: -2 ⋅ (3 + 8 ÷ 4)².

Back

-50

Tags

CCSS.6.EE.A.1

Front

What is the formula for the perimeter of a rectangle?

Back

The formula for the perimeter (P) of a rectangle is P = 2L + 2W, where L is the length and W is the width.

Tags

CCSS.4.MD.A.3

Front

If the length of a rectangle is 20 inches and the width is 10 inches, what is the perimeter?

Back

60 inches

Tags

CCSS.4.MD.A.3

Front

What is a variable in mathematics?

Back

A variable is a symbol (often a letter) that represents an unknown value in an expression or equation.

Tags

CCSS.6.EE.A.2B

Front

What is a coefficient in an algebraic expression?

Back

A coefficient is a numerical factor that multiplies a variable in an expression.

Tags

CCSS.6.EE.A.2B