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.

Front

What is a coefficient in an expression?

Back

A coefficient is a numerical factor that multiplies a variable in an expression. For example, in 5y, 5 is the coefficient.

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.

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 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).

Front

What is the result of the expression 4(3 + 2x) - 5?

Back

The simplified expression is 8x + 12 - 5, which equals 8x + 7.

Front

In the equation 5y - 2 = 8, what operation is being performed?

Back

The operation being performed is subtraction (-).

Front

What is a constant in an expression?

Back

A constant is a fixed value that does not change. For example, in the expression 6 + n, 6 is a constant.

Front

What is the value of the expression (19 - 7) ÷ 4 + 11?

Back

The value of the expression is 14.

Front

What is the difference between an equation and an expression?

Back

An equation states that two expressions are equal, while an expression does not include an equality sign.