Comparing & Scaling 7th grade 500 100 200 300 100 300 200 300 200 100 200 500 300 100 400...

Comparing & Scaling7th grade

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Comparison

Statements

Vocabulary Terms

Percents in

problems

Rates in problems

Ratios in problems

200200

Comparing & Scaling

What is a “ratio”?

Vocabulary Terms for $100

Click here to check Click here to check your answeryour answer

A ratio is a comparison of two

things.

Back toJeopardy Board

What is a “rate”?

A rate is a comparison of two DIFFERENT

variables

What is a “unit rate”?

A unit rate is one in which one of the values

is one unit.

What does the term “scaling” mean?

Scaling tells how many times larger or smaller

one value is than another value

What is “population density”?

Population density is the ratio of the number of people in a given area

Write a ratio comparing teen boys to teen girls.

Ratios in problems for $100

People incategory

Have apet

Brushteeth daily

Sing inthe car

Teen Boys 35 18 33 5Teen Girls 30 22 27 10Adult Boys 40 8 40 19Adult Girls 30 14 30 3TOTAL 135 62 130 37

35 to 30

Write a ratio comparing adult girls who brush to

teen girls who brush.People incategory

Have apet

Brushteeth daily

Sing inthe car

30 to 27

Write a ratio comparing teen boys who sing to

teen boys.People incategory

Have apet

Brushteeth daily

Sing inthe car

5 to 35

Write a ratio comparing girls who own pets to boys who own pets.

People incategory

Have apet

Brushteeth daily

Sing inthe car

36 to 26

Write a ratio comparing teen boys who sing &

brush to adult girls who sing & brush.People in

categoryHave a

petBrush

teeth dailySing inthe car

38 to 33

The Pope-mobile can go 20 miles on 4.5 gallons of gas. How far could it

go on 22.5 gallons?

Rates in problems for $100

100 miles

Old Navy is selling 3 t-shirts for $21.75. Find

the cost per shirt.

$7.25 per shirt

At McDonalds, the cook can make 18 Big Mac’s in

4 minutes. How many can he make per minute?

4.5 Big Mac’s per minute

Ken and Barbie were exercising. Ken did 27

sit-ups in 3 minutes and Barbie did 30 sit-ups in 3.5 minutes.

Who did the most sit-ups per minute?Click here to check Click here to check

your answeryour answer

Ken can do more sit-ups per minute.

Burt and Ernie are taking a keyboarding test. Burt can type

200 words in 17 minutes. Ernie can

type 171 words in 15 minutes. Who is

typing faster?

Burt is typing faster.

While shopping for a Valentines gift, Lib R. Tee found a diamond ring for

$100 on sale for $80 What percent savings is this?

Percents in problems for $100

20% savings

Millie Meter bought a DVD player on sale for

$208. The original price was $320. What percent

did Millie save?

Millie saved 35%

A 12 pack of Bolda Cola costing $3 are on sale

for $2.55. What percent savings is this?

A 15% savings

The new Pokemon video is on sale for $9.89,

regularly $12.99. What percent saving is this?

About a 24% savings

What percent of teens brush daily?

People incategory

Have apet

Brushteeth daily

Sing inthe car

About 38%

Comparison Statements for $100

Identify the type of statement:

18% of students like English best, while 82% of students like math

best. Click here to check Click here to check

your answeryour answer

Percent comparison

There are 197 more eighth graders than seventh graders.

Difference comparison

The ratio of seventh graders to eighth graders

is 442 to 639.

Ratio comparison (part-to-part)

There are about 1.4 times as many eighth graders

as seventh graders.

Scaling comparison

About 220 of 987 students are sixth

graders.

Ratio or Fraction comparison (part-to-

whole)

Comparing & Scaling 7th grade 500 100 200 300 100 300 200 300 200 100 200 500 300 100 400...

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