Lesson 10-1Order of Operations

November 11, 2015

Today’s Supplies Grading Pen

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.

VocabularyNumerical 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!!

Evaluate: 4 + 24 ÷ 2 – 5 x 3 + 7

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”.

VIDEO:

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

Steps:

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

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

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

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

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

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

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

8. Find the value of the expression

9. Find the value of the expression

10. Find the value of the expression

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

Order of Operations ws #1