Mth060 Day 3 Sections 1.4 & 1.8. Multiplication & Division with Real Numbers Section 1.4.

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Presentation transcript:

Mth060 Day 3 Sections 1.4 & 1.8

Multiplication & Division with Real Numbers Section 1.4

Operations with Signed Numbers Rules for Add/Subtract different than Mult/Div Addition – Find the SUM Subtraction – Find the DIFFERENCE Multiplication – Find the PRODUCT Division – Find the QUOTIENT Handout – REFERENCE SHEET

Ways to Write Multiplication Same Thang! NOT the Same Thang!

Multiplication by Zero Everything MULTIPLIED by zero is (=) zero

Ways to Write Division Same Thang! Something to MEMORIZE! Check this out on your calculator

Same Thang! Where do I put the negative sign? NOT THE SAME THANG!

Example #1 – Find the Product

True/False

Average aka Mean Average Defined: the average of a SET of numbers is the sum of the set of numbers divided by the number of numbers in the set.

Example #2 Fifteen students scored the following scores on an exam in Algebra I: 1 scored 67, 4 scored 73, 3 scored 77, 2 scored 80, 3 scored 88, and 2 scored 93. What was the average score for these students?

Try it… Find the mean of the following set of integers: -10, 15, 16, -17, -34, and -42

Order of Operation Section 1.8

Rules for Order of Operations 1.Simplify within grouping symbols parentheses ( ), brackets [ ], and braces { }, working from the innermost grouping outward. 2.Evaluate exponents. 3.Moving LEFT to RIGHT, perform multiplication OR division. 4.Moving LEFT to RIGHT, perform addition OR subtraction.

PEMDAS Mnemonic to remember order: Parentheses Exponents Multiplication OR Division (caution: left to right) Addition OR Subtraction (caution: left to right)

More examples of “grouping symbols” Fractions: Absolute Values: Roots:

Example #1 Use the Order of Operations to evaluate the expression:

Try it… Use the Order of Operation to evaluate the expression:

Summary Syllabus Reference sheet Multiplication/Division Rules versus Addition/Subtraction Rules Combine it all together with Order of Operation: PEMDAS

Coming up… Due Dates Quiz #2 Due Friday (RECALL: includes problems from Day 1 forward) – Taken in SMART Lab – Lab Closes at 4 PM on Fridays Reading Guides for Day #4 – Sections 2.1a-b – On Blackboard

Exit Ticket 1.Find the SUM: 2.Find the DIFFERENCE: 3.Find the PRODUCT: 4.Find the QUOTIENT: