Ratios

Presentation

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Mathematics

•

6th Grade

•

Practice Problem

•

Medium

•

CCSS

6.RP.A.1, 6.RP.A.3A, 6.RP.A.2

Standards-aligned

Kellyn Morning

Used 20+ times

FREE Resource

7 Slides • 6 Questions

Ratios

Mrs. Cantu

What is a ratio?

A ratio is a comparison of two numbers. It can be written three different ways.

Example: In a bag, there are 5 yellow marbles and 3 blue marbles.

Let's compare yellow to blue.

5 to 3

5:3

5/3

The order in which you write the ratio is important to the meaning.

Multiple Choice

Patrick has 2 black, 3 red, and 5 white toy cars. What is the ratio of red toy cars to all the toy cars?

3:5

1:3

3:11

3:10

Equivalent Ratios

We can find equivalent ratios using multiplication or division
Example 4:5, 8:10, 12:15

Turn and Talk

There are 2 red fish and 8 blue fish. The ratio of red fish to blue fish is 2:8. With your partner, determine two equivalent ratios.

Multiple Choice

Which ratio is equivalent to 5 to 4

25 to 20

10 to 12

4 to 5

15 to 8

Multiple Choice

Choose all ratios that are equivalent to 4 to 8.

1 to 2, 3 to 6

1 to 2

1 to 2, 12:15, 12 to 24

1 to 2, 3:6, 12:24

Compare the number of hammers to the number of nails.

There are 3 hammers and 12 nails.
The ratio of hammers to nails is 3 to 12, or 3/12
3/12 simplifies to 1/4. For every 1 hammer, there are 4 nails.
There are 4 times as many nails as hammers

Open Ended

If there are 7 boys and 8 girls on the track team, what is the ratio of girls to boys? Write your answer three different ways.

Type response here

Example

The ratio of boys to girls on a track team is 7 to 8. Write the ratio three different ways.

If there are 49 boys on the team, how many girls are there?

Open Ended

The ratio of boys to girls on a track team is 7 to 8. If there are 24 girls on the track team, how many boys are there?

Type response here

Multiple Choice

If the ratio of boys to girls is 5:7, and there are 35 girls, how many boys are there?

Ratios

Mrs. Cantu

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