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 include 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/BODMAS: Parentheses/Brackets, Exponents/Orders, Multiplication and Division (from left to right), Addition and Subtraction (from left to right)).

Front

What does the term 'order of operations' refer to?

Back

The order of operations is a set of rules that dictates the sequence in which operations should be performed in a mathematical expression to ensure consistent results.

Front

What is the value of 3^2?

Back

3^2 means 3 multiplied by itself, which equals 9.

Front

How do you simplify the expression (7 + 41) ÷ 2 – 15?

Back

First, calculate (7 + 41) = 48. Then, divide by 2 to get 24. Finally, subtract 15 to get 9.

Front

What is the result of 2 + (9^2 - 4)?

Back

First, calculate 9^2 = 81. Then, subtract 4 to get 77. Finally, add 2 to get 79.

Front

How do you evaluate the expression 2 × 3^3 + 7?

Back

First, calculate 3^3 = 27. Then, multiply by 2 to get 54. Finally, add 7 to get 61.

Front

What does the expression [(6 x 3)] x 2 ÷ 9 evaluate to?

Back

First, calculate 6 x 3 = 18. Then, multiply by 2 to get 36. Finally, divide by 9 to get 4.

Front

What is the significance of parentheses in numerical expressions?

Back

Parentheses indicate which operations should be performed first in a numerical expression, following the order of operations.

Front

What is an exponent in mathematics?

Back

An exponent is a number that indicates how many times to multiply the base number by itself.