2. Vocabulary Numerical Expression – pg. 21 - an expression, consisting of numbers and operations to be performed, that represents a particular value (a math problem with out an equal sign (=) Grouping Symbols – pg. 21 - symbols such as parentheses, brackets, or fraction bars that group parts of an expression.

3. Vocabulary Evaluate – pg. 21 - to find the value of an expression (find the answer of the problem). Order of Operations – pg. 21 - the order in which to perform operations when evaluating expressions with more than one operation.

5. Using the Order of Operations = 14 – 10 14 – 2 x 5 14 – 2 x 5 16 + 4 ÷ 2 - 6 16 + 4 ÷ 2 - 6 16 + 2 - 6 = 18 - 6

6. Powers and Grouping Symbols 4 + 2 3 = 4 + 8 (3 +1) x 5 = 4 x 5

7. Multi Step Problems Your class is going to the zoo. It costs $16 for each adult and $9 for each student. There are 3 adults and 22 students. What is the total cost of admission? (3 x 16) + (22 x 9) Cost for adults Cost for students 48 + 198 = $246 It would cost $246 for your class to go to the zoo .