Expressions & Equations 6th grade

Front

What is an expression in mathematics?

Back

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

Front

What does it mean to simplify an expression?

Back

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

Front

What are like terms?

Back

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

Front

How do you combine like terms?

Back

You combine like terms by adding or subtracting their coefficients. For example, 3n + 2n = 5n.

Front

What is the order of operations?

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). This is often remembered by the acronym PEMDAS.

Front

What is a variable in an expression?

Back

A variable is a symbol, usually a letter, that represents an unknown value in an expression or equation.

Front

What is an equation?

Back

An equation is a mathematical statement that asserts the equality of two expressions, typically containing an equal sign (=).

Front

How do you solve for a variable in an equation?

Back

To solve for a variable, you isolate the variable on one side of the equation using inverse operations.

Front

What does it mean to evaluate an expression?

Back

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

Front

What is the value of 2^3?

Back

The value of 2^3 is 8, because 2 multiplied by itself three times equals 8.