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 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 abbreviated as PEMDAS.

Front

What does it mean to simplify an expression?

Back

To simplify an expression means to reduce it to its simplest form by performing operations and combining like terms.

Front

What is the result of 3 + 4 x 6 - 4?

Back

The result is 19. (First, perform multiplication: 4 x 6 = 24, then add and subtract: 3 + 24 - 4 = 23.)

Front

How do you represent '3 times as much' in an expression?

Back

'3 times as much' can be represented as 3 multiplied by the quantity, for example, 3 x (amount).

Front

What is the expression for 'subtract 9 from 15 and divide by 3'?

Back

The expression is (15 - 9) ÷ 3.

Front

How do you use parentheses in expressions?

Back

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

Front

What is the expression for '5 times 4 minus 3 plus 24 divided by 6 plus 2'?

Back

The expression is 5 x 4 - 3 + 24 ÷ 6 + 2.

Front

What is the simplified form of (2 + 7 - 1) ÷ 2²?

Back

The simplified form is 2.

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting numbers for variables and performing the operations.