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by: Sofia Berkey

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# Math 208 Week 2 MATH 208

Sofia Berkey
Elon University

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Fractions!
COURSE
Number And Operations
PROF.
Rosenberg
TYPE
Class Notes
PAGES
3
WORDS
KARMA
25 ?

## Popular in Mathematic

This 3 page Class Notes was uploaded by Sofia Berkey on Wednesday September 14, 2016. The Class Notes belongs to MATH 208 at Elon University taught by Rosenberg in Fall 2016. Since its upload, it has received 2 views. For similar materials see Number And Operations in Mathematic at Elon University.

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Date Created: 09/14/16
Rounding Using an Algorithm 1. Circle place digit that you want to round to 2. Underline​ key di​ the digit to the right of the one circled 3. If the key digit is 5 or higher, we round up a. Circled number increases by one b. All digits to the right of the circled number change to 0 4. If the key digit is 4 or less, we round down a. Circled number stays the same b. All digits to the right of the circled number change to zero Rounding examples… 1. 5724→ round to the nearest ten → 5720 2. 25.64→ round to nearest tenth → 25.60 3. 879→ round to the nearest hundred → 900 Rounding Using a Number Line Ex: round 273 to the neare​ undred ______________​273_ ​ ______ 200 250 300 → ​300 Ex: round 31.781 to the near​ undredth __​31.781​______________________ 31.780 31.785 31. 790 → ​31.780 Ex: round 274.18 to the near​ enth ____________________2 ​ 74.1​ ___ 274.10 274.15 274.20 → ​274.20 Rounding with Real - world quantities ● Foods and distances are rounded ● First nonzero digit from the right is the value the number has been rounded to Defining and Reasoning With Fractions Objectives: 1. Basics of fractions 2. The whole→ strip diagrams 3. Number line 4. Improper vs proper 5. Fractions as division Basics: Fractions: A/B A=Numerator B=Denominator B≠O Ex: rachel ate ⅓ of a candy bar 1=part 3=whole 3 parts=1 whole Whole of a fraction Ex: what fraction is described below? ➢ 1 ⅔ ➢ 5/3 ➢ ⅚ Fractions on the Number Line ● Hints: draw/label relevant numbers ● Divide units up equally Ex: label ⅗ on a number line 0 ⅕ ⅖ ​ ⅗ ⅘ 1 Proper vs. Improper ● Proper fraction: A/B A<B, B≠O ● Improper fraction: A/B, A≥B, B≠O Ex of proper: 3/7, 1/3 Ex of improper: 5/5, 8/3 Fractions as Division A/B, B≠O → A​ ÷B 9/3 → 9 ÷3=3

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