Expressions vs Equations

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (like +, -, *, /) that represents a value but does not have an equality sign.

Front

What is an equation in mathematics?

Back

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

Front

What is a coefficient?

Back

A coefficient is a numerical factor in a term of an expression or equation. For example, in 5x, 5 is the coefficient.

Front

What is a constant in an expression?

Back

A constant is a fixed value that does not change. In the expression 3x + 4, the number 4 is a constant.

Front

What is a variable?

Back

A variable is a symbol (often a letter) that represents an unknown value in an expression or equation, such as x or y.

Front

What does it mean to simplify an expression?

Back

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

Front

What is the difference between an expression and an equation?

Back

An expression does not have an equals sign and represents a value, while an equation states that two expressions are equal.

Front

What is the operation represented by 15y?

Back

The operation represented by 15y is multiplication, meaning 15 times y.

Front

How do you identify the number of variables in an equation?

Back

Count the different letters (variables) present in the equation. For example, in 3x + 14 - 5y = 42, there are 2 variables: x and y.

Front

What is the purpose of using parentheses in expressions?

Back

Parentheses indicate which operations should be performed first in an expression.