1. 1-4 Order of Operations Main Idea Evaluate expressions using the order of operations.

2. Evaluate this: 6-5x3÷5+1= 4

3. Order of Operations
Evaluate the expressions inside grouping symbols. Example: 3+(4x3) = 3+12 = 15
Evaluate all powers. Example:
Multiply and divide in order from left to right.
Add and subtract in order from left to right.

4. Evaluate again using the orders of operations: 6-5x3÷5+1=

5. 6-5x3÷5+1= Step 1. Does not apply because there are no ().
powers.
Step 3. Multiply 5x3 = 15. Then divide 15 ÷5=3.
We are left with:
6-3+1=
Step = =4.

6. 22-3(8-2)+12÷4=
Step 1. (8-2)=6 We now have 22-3(6)+12÷4= Step 2. Does not apply. No exponents/powers Step 3. 3(6)=18 and 12÷4=3 We now have Step 4. Solving Left to right, 22-18=4 and 4+3=7

7. Activity

8. Problem 1
6+8÷2+2(3-1)=

9. Problem 2

10. Problem 3
(6+5)x(8-6)=

11. Problem 4
45÷(4-1) =