6th grade Math Review 3rd 6 weeks Ratio & Proportions

6th grade Math Review 3rd 6 weeks Ratio & Proportions

Practice

Ratios

• Always write in ORDER OF QUESTION

• Simplify, simplify, simplify!

Measurement Proportions

• Must get UNIT RATE from the STAAR chart

• Set up with labels

• Add missing unit to correct section of ratio

• Solve using cross products or factors like in picture

Percent Proportions

• You will onlt be given a percent or be asked to find percent

• You must know that 100 is the WHOLE PERCENT and goes with the percent given or asked

• Set up part to whole = part to whole- Use cross products or factor to solve

• Remember the parts equal each other- represent same LABEL(Tip=% Tip)!

UNIT RATES

• Its a ratio you set up and simplify to 1 unit

• Used to find miles per gallon, cost per pound......TO COMPARE WHICH IS THE BEST!

• DIVIDE......What it ask.. cost per item(divide cost) Miles per gallon(Divide miles)

• Used to determine better buy- Cheapest!

Percent to decimal to fraction

• READ the question

• If no percent or decimal MAKE A FRACTION from the parts

• Almost all relationships can be wriiten as a fraction

• Ex: 2 out of 5= 2/5 Or you spent $8 out of $20 = 8/20.....and ALL fractions can be changed to a decimal or percent!

Circle Graphs - use Percents

• Can be used to solve for missing parts or wholes

• If 200 vegatables were planted, how many are Squash?

• Know 25%/100% is squash so 25/100= x/200, so 50 plants were squash.......SET UP Proportion and solve

Multiple Choice

A shirt cost $30 and you received a $12 discount. What percent did you receive for a discount?

• 20%

• 40%

• 42%

• 18%

Multiple Choice

You have 130 red markers and 70 blue markers. What percent of the markers were blue?

• 35%

• 45%

• 50%

• 65%

Multiple Choice

If 60 pizzas were ordered, how many were pepperoni?

USE THE GRAPHIC

• 20

• 25

• 30

• 40

Multiple Choice

There are 0.234 kilometers. What is this number as a meter?

• 2.34

• 23.4

• 234

• 2340

Multiple Choice

You have 54 centimeters. How many millimeters do you have?

• 0.54

• 5.4

• 540

• 5400

Multiple Choice

You have 10 inch strips and you want to make 24 strips. How many feet do you have?

• 24 feet

• 20 feet

• 18 feet

• 10 feet

Multiple Choice

You have 6 gallons, how many pints do you have?

• 14

• 24

• 36

• 48

Multiple Choice

What decimal represents the parts shaded?

• 0.38

• 0.62

• 3.8

• 6.2

Multiple Choice

What percent of the grid is not shaded?

• 27%

• 73%

• 2.7%

• 7.3%

Multiple Choice

Juan rides his bike 30 miles in 8 hours. At this rate how many miles does he ride his bike in 2 hours?

• 15 miles

• 7.5 miles

• 1.8 miles

• 30 miles

Multiple Choice

A can of 30 markers has 4 yellow, 10 blue and 16 green markers. What is the ratio of blue markers to the can of markers?

• 5:8

• 3:10

• 1:3

• 2:5

Multiple Choice

Using the table to the right....If 480 students wanted coconut cookies, how many students selected coconut?

• 20

• 40

• 60

• 80

Multiple Choice

If it takes 6 yards of material to make 5 dresses, how many dresses can you make with 18 yards of material?

• 6

• 15

• 23

• 30

Multiple Choice

You have 5 ducks and 8 geese. At this rate, if you now have 32 geese, how many ducks do you have?

• 20

• 40

• 37

• 45

Multiple Choice

You have 28 inches, how many feet do you have?

• 2 and 1/3 feet

• 2.4 feet

• 1.8 feet

• 1 and 4/10 feet