Solving expressions

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (like +, -, ×, ÷) 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 variables with numbers and performing the operations.

Tags

CCSS.6.EE.A.2C

Front

What is the order of operations?

Back

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

Tags

CCSS.7.NS.A.3

Front

Evaluate the expression: 3 + 4 × 2

Back

11 (First multiply 4 × 2 = 8, then add 3 + 8 = 11).

Tags

CCSS.5.OA.A.1

CCSS.5.OA.A.2

Front

What is a variable in an expression?

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?

Back

A coefficient is a number that is multiplied by a variable in an expression. For example, in 4r, 4 is the coefficient.

Tags

CCSS.6.EE.A.2B

Front

How do you simplify an expression?

Back

To simplify an expression, combine like terms and perform any operations according to the order of operations.

Tags

CCSS.7.EE.A.1

Front

Evaluate the expression: 2x + 3 when x = 4.

Back

11 (2 × 4 + 3 = 8 + 3 = 11).

Tags

CCSS.6.EE.A.2C

Front

What is a constant in an expression?

Back

A constant is a fixed value that does not change. For example, in the expression 5x + 3, the number 3 is a constant.

Tags

CCSS.6.EE.A.2B

Front

What does it mean to solve an equation?

Back

To solve an equation means to find the value of the variable that makes the equation true.

Tags

CCSS.7.EE.B.4A