Demonstrate what a big difference parentheses can make in the value of an expression.
Many students think that parentheses are used only around two numbers.
This does not have to be the case. When you have more than two numbers inside parentheses, you follow order of operations inside the parentheses as well. Therefore, you would find 2 x 5 first and add that to 3 which would yield 13. Since the parentheses have been removed, you now proceed with order of operations for the remainder of the problem. Although your students may only encounter one set of parentheses at this level, you can show them that more than one set of parentheses can be used in a single expression.