1. Lesson 10-1 Order of Operations November 11, 2015  Grading Pen

2. Process Standard: 5.4E – Describe the meaning of parenthesis and brackets in a numeric expression 5.4F – Simplify numerical expressions that do not involve exponents, including up to two levels of grouping. Standard: 5.1G - display, explain, and justify mathematical ideas and arguments using precise mathematical language in written or oral communication.

3. Numerical Expression A combination of numbers and operations Order Of Operations The rules that tell you the order to solve the operations in a math problem. HINT: All the following mean to multiply!!

4. Evaluate: 4 + 24 ÷ 2 – 5 x 3 + 7

5. Many years ago, mathematicians around the world came up with different answers to the same problem just as we did. The mathematicians met and agreed on a standard order in which to perform the operations in a problem, so that everyone would get the same answer to a particular problem. This order was accepted as the standard by all mathematicians. We call this the “order of operations”.

6. http://www.youtube.com/watch?v=d0xutl2sUt0

9. 1. Find the value of the expression 6 + 3 × 9.

10. 2. Find the value of the expression 3 + 5 × 9.

11. 3. Find the value of the expression 4 + (10 – 3).

12. 4. Find the value of the expression 21 – 6 + 9.

13. 5. Find the value of the expression 90 ÷ 3 + (3 – 2) – 20.

14. 6. Find the value of the expression 85 ÷ 5 + 14 × (12 – 8).

15. 7. Find the value of the expression 64 + 5 × 2 – 1.

19. Evaluate: 4 + 24 ÷ 2 – 5 x 3 + 7 Was your answer correct?

20. Order of Operations ws #1