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

How do you evaluate a numerical expression?

Back

To evaluate a numerical expression, perform the operations in the correct order, following the order of operations (PEMDAS: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right)).

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 in a numerical expression: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

Front

If a pair of students receives 3 magnets, how many magnets do 9 pairs receive?

Back

9 pairs x 3 magnets per pair = 27 magnets.

Front

How do you calculate the total cost of multiple items?

Back

To calculate the total cost, multiply the price of each item by the quantity purchased and then add the costs together.

Front

What is the total cost of 6 posters at $9 each?

Back

6 posters x $9 = $54.

Front

What is the total cost of 6 framed posters if each frame costs $15?

Back

Total cost = (6 posters x $9) + (6 frames x $15) = $54 + $90 = $144.

Front

If a hamburger costs $3 and a soda costs $1, what is the total cost for 2 hamburgers and 1 soda?

Back

Total cost = (2 x $3) + (1 x $1) = $6 + $1 = $7.

Front

What is a pair in mathematics?

Back

A pair refers to two items that are grouped together, often used in problems involving combinations or groups.

Front

How do you find the difference between two numbers?

Back

To find the difference, subtract the smaller number from the larger number.