Transcript 6.1 ratios and unit rates

1. Write the decimal as a fraction in simplest form.
1.Simplify.
A.)
3. Solve by clearing.
B.)
10.0105
Section 6.1: Ratios, Rates, &
Unit Rates
Objective: You will be able to identify ratios and rates. You will be able to
compute unit rate to determine the better buy
RATIOS
Definition: A ratio is a comparison of two numbers. It is
usually expressed as a fraction in simplest form.
Three different ways to express a ratio10 to 15
10:15
10
15
To simplify a ratio, write the fraction in simplest form.
2 to 3
2:3
2
3
RATIOS continued
In the 2005-2006 regular season, the NJ Nets won 49 games and lost 33.
1.) What is the ratio of games won to the number of games lost? ________
2.) What is the ratio of games lost to games won? _________
3.) What is the ratio of games won to the total number of games played? ____
4.) What is the ratio of the games lost to the total number of games played?
RATES
 Definition: A rate is a
fixed ratio between
two quantities with
different units
 Rates are often used to
express change over
time
# of boys to girls in the class
# of CDs to the cost of CDs
# of green apples to # of red apples
# of miles driven to amount of time
Unit rates
Unit Rate: Rate for one unit
(has a denominator of 1)
Examples:
Find each UNIT RATE
1.) Pranav got paid $91 for working 14 hours
2.) Ava was thirsty and spent $13.14 for 12 gallons of milk
3.) Ms. Ku can type 592 words in 8 minutes
Remember…
To find the unit rate…
 When the denominator of a rate is 1, we call the rate a unit rate. We usually
use the key word per OR the division sign / to indicate a unit rate.
 Example:
 90 eggs from 15 chickens
90 𝑒𝑔𝑔𝑠
= 6 eggs per chicken
15 𝑐ℎ𝑖𝑐𝑘𝑒𝑛𝑠
Embrace the unit price!
UNIT RATE and finding the “BETTER BUY”
WHICH IS
THE BETTER
BUY?
Ms. Ku is planning a math party and
needs your help!!
With your partner….
1. Calculate the UNIT PRICE of each item on her list. Then help her
determine which store she should go to to find the lowest possible
unit price.
2. Work together to help Ms. Ku stay under budget!
3. Show perfect work and label your solutions correctly!
HOMEWORK
Practice 6.1/ UR1 Worksheet
- Show proper work and label your answers!!
If you have not done so yet, clean out your binders!!
Keep the following:
 Today’s notes/ homework
 All your tests/quizzes