By Shaunte Morris

Galena Park Middle School football team made one 6-point touchdown and four 3-point field goals in their last game. Shanique and Justin each use an equation to find the total number of points the team scored. Shanique’s Equation x 3 = = 18 The team scored 18 points Justin’s Equation x 3 = 10 x 3 = 30 The team scored 30 points.

Shanique’s Equation x 3 = = 18 The team scored 18 points Justin’s Equation x 3 = 10 x 3 = 30 The team scored 30 points. What are the differences in their calculations? Whose calculations are correct? Shanique is correct!

The expression used by Shanique and Justin is a numerical expression. To evaluate the expression, use the ORDER OF OPERATIONS! These rules ensure that numerical expressions have only one value.

Order of Operations 1. Operate inside parentheses. P 2. Clear exponents. E 3. Multiply and Divide from left to right. M D 4. Add and Subtract from left to right. A S

Let’s do this example together! 65  5 x 3 - 2³ P E MD AS 8 65  5 x 3 - Remember to work from left to right 13 x The answer is 31 Remember to work from left to right

Try this example on your own! Evaluate the expression 5 + (12 – 3) The answer is 14

Example: 81 ÷ ( 7 – 4 ) =

Another Example: (7 * 3) =

Try this one: 2(5  3) + (6 ✖ 2) =

20 – – 2  3 =

Try this one! Evaluate 5 x 3² - 7 The answer is 38

Try this one! Simplify the expression 45  (4 – 1)² The answer is 5

Try this last example! Simplify the expression 2(4² + 5) The answer is 42

WAY TO GO!!