Evaluating Expressions

Front

What is the order of operations in mathematics?

Back

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

Front

What operation should be performed first in the expression 10 - 4 ÷ 1 x 5?

Back

Division should be performed first.

Front

If a = -5 and b = 2, what is the value of 2a + 3b?

Back

The value is 10.

Front

What is the value of the expression -x(-y) when x = -1 and y = -3?

Back

The value is 3.

Front

True or False: Addition ALWAYS comes before subtraction in the order of operations.

Back

False.

Front

What is the result of 8 + 2 x 5?

Back

The result is 18, because multiplication is performed before addition.

Front

What does the term 'evaluate' mean in mathematics?

Back

To evaluate means to calculate the value of an expression.

Front

In the expression 3 + 4 x 2, which operation do you perform first?

Back

You perform multiplication first, so the result is 11.

Front

What is the value of the expression 5 - 3 + 2?

Back

The value is 4, as you perform addition and subtraction from left to right.

Front

What is the value of 6 ÷ 2(1 + 2)?

Back

The value is 9, as you first evaluate the parentheses, then perform division and multiplication.