Numerical Expressions

A numerical expression is a mathematical phrase that includes numbers and operations (such as addition, subtraction, multiplication, and division) but does not contain any variables.

To simplify an expression with parentheses, first perform the operations inside the parentheses, then follow the order of operations (PEMDAS/BODMAS) for the remaining calculations.

PEMDAS stands for Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right). It is the order of operations used to evaluate expressions.

The first step is to simplify the expression inside the parentheses: (3 + 6) = 9.

The expression is represented as 2 + (6 x 3).

The result is 57.

The expression is (6 + 3) x 9 - 4.

The associative property of multiplication states that the way in which numbers are grouped in multiplication does not change the product. For example, (a x b) x c = a x (b x c).

The commutative property of addition states that changing the order of the addends does not change the sum. For example, a + b = b + a.

You can rewrite it as 6 x (3 x 8).