Numerical Expressions

Front

What is a numerical expression?

Back

A numerical expression is a mathematical phrase that includes numbers and operations (such as addition, subtraction, multiplication, and division) but does not have an equal sign.

Front

What does it mean to evaluate a numerical expression?

Back

To evaluate a numerical expression means to calculate its value by performing the operations in the correct order.

Front

What is the order of operations?

Back

The order of operations is a set of rules that determines the sequence in which calculations are performed: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right). Often remembered by the acronym PEMDAS.

Front

How do you add decimal numbers?

Back

To add decimal numbers, align the decimal points and add as you would with whole numbers, carrying over if necessary.

Front

What is the sum of 0.75 and 1.25?

Back

The sum of 0.75 and 1.25 is 2.00.

Front

What does 'the sum of' indicate in a numerical expression?

Back

'The sum of' indicates that you need to add the numbers that follow.

Front

What does 'the product of' indicate in a numerical expression?

Back

'The product of' indicates that you need to multiply the numbers that follow.

Front

How do you subtract decimal numbers?

Back

To subtract decimal numbers, align the decimal points and subtract as you would with whole numbers, borrowing if necessary.

Front

What is the difference between 4.5 and 2.5?

Back

The difference between 4.5 and 2.5 is 2.0.

Front

What does 'less than' mean in a numerical expression?

Back

'Less than' indicates subtraction. For example, 'four less than five' means 5 - 4.