Writing 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 does it mean to 'add' a number to a variable?

Back

Adding a number to a variable means to increase the value of the variable by that number. For example, '7 more than a number b' is written as b + 7.

Front

How do you represent 'subtracted from' in an expression?

Back

When something is 'subtracted from' a variable, it means you take that number away from the variable. For example, '13 subtracted from t' is written as t - 13.

Front

What is a coefficient in an algebraic expression?

Back

A coefficient is a number that is multiplied by a variable. For example, in 3x, 3 is the coefficient.

Front

What is a constant in an algebraic expression?

Back

A constant is a fixed value that does not change. For example, in the expression 2x + 7, 7 is the constant.

Front

How do you express division in algebra?

Back

Front

What is the difference between a variable and a constant?

Back

A variable is a symbol that represents an unknown value, while a constant is a specific value that does not change.

Front

What does it mean to evaluate an expression?

Back

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

Front

How do you write 'the sum of a number x and 5'?

Back

The sum of a number x and 5 is written as x + 5.

Front

What is the term for the result of multiplying a number by a variable?

Back

The result of multiplying a number by a variable is called a term. For example, 4x is a term.