Writing Expressions Practice

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 write an expression for 'half as many'?

Back

It means to divide the quantity by 2.

Front

How do you represent 'four times as many apples' in an expression?

Back

You multiply the number of apples by 4, represented as 4a.

Front

What is the expression for saving $50 per month starting with $200?

Back

The expression is 200 + 50x, where x is the number of months.

Front

What does 'the quotient of z and -2' mean in mathematical terms?

Back

It means to divide z by -2, represented as z ÷ (-2).

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.

Front

What is a variable in mathematics?

Back

A variable is a symbol (often a letter) that represents an unknown value.

Front

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

Back

You write it as x + 5, where x is the unknown number.

Front

What does it mean to evaluate an expression?

Back

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

Front

What is the expression for 'three less than a number'?

Back

It is represented as x - 3.