Ratios Interactive Lesson

​Ratios can be

PART TO PART

OR

PART TO WHOLE​

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​Part to Part

The ratio of stars to circles is 2 to 5​

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​Part to Whole

The ratio of stars to shapes is 2 to 7​

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​Part to Whole

The ratio of circles to shapes is 5 to 7​

Multiple Choice

If there are 5 boys and 7 girls, write the ratio of boys to girls.

• 5 to 7
• 7 to 5
• 5 to 12
• 7 to 12

Multiple Choice

In the fruit bowl there are 4 apples, 2 bananas, and 5 pears.  What is the ratio of pears to ALL fruit?

• 5:4
• 5:11
• 2:5
• 6:5

​Monkeys to Bananas

4:5, 4 to 5, 4/5​

order is important!

Multiple Choice

What is the ratio of orange to blue shapes?

• 3 : 2

• 2 : 3

• 3 : 5

Multiple Choice

What is the ratio of blue shapes to total shapes?

• 3 : 2

• 2 : 3

• 2 : 5

Multiple Choice

There are 3 pears and 7 apples. What is the ratio of pears to apples?

• 1 to 7

• 3 to 9

• 7 to 3

• 3 to 7

Ratios need to be SIMPLIFIED!

3 : 6 needs to be simplified to 1 : 2.

Multiple Choice

There are 6 apples and 3 pears. Which represents the ratio of apples to pears?

• 3 : 2

• 4 : 1

• 2 : 1

• 1 : 3

Multiple Choice

There are 5 girls and 10 boys in the park. What is the ratio of girls to boys?

• 5 : 2

• 1 : 2

• 1 : 5

• 2 : 1

Multiple Choice

On the farm, there are 9 pigs and 18 chickens. What is the ratio of chickens to pigs?

• 2 to 9

• 9 to 2

• 1 to 2

• 2 to 1

​What does a ratio mean?

​On a farm, the ratio of cows to pigs is 5 to 1.

Does this mean the farm has 5 cows and 1 pig?​

​What does a ratio mean?

​On a farm, the ratio of cows to pigs is 5 to 1.

Does this mean the farm has 5 cows and 1 pig?​

​NO

​What does a ratio mean?

​On a farm, the ratio of cows to pigs is 5 to 1.

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​It means for every 5 cows,

there is 1 pig.

​The ratio of lambs to chicks is 1:3. This means that FOR EVERY 1 lamb, THERE ARE 3 chicks.

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If there were 2 lambs, how many chicks would there be?​

​The ratio of dogs to cats is 3 to 1. What does this mean??????

​The ratio of dogs to cats is 3 to 1. What does this mean??????

​For every 3 dogs, there is 1 cat.

Multiple Choice

Which ratio matches the picture?

• 6 : 1

• 3 to 1

• 1 to 3

Multiple Choice

On a field trip, the ratio of students to teachers is 9 to 1. What does this mean?

• for every 9 students there is 1 teacher

• for every 9 teachers there is 1 student

• 10 people are going on a field trip

Multiple Choice

At the dog park, the ratio of people to dogs is 2 : 5. What does this mean?

• there are 5 people at the dog park

• for every 5 people there are 7 dogs

• for every 2 people there are 5 dogs

Multiple Choice

The ratio of cows to chickens is 1:3. What does that mean?

• There are 3 chickens and 1 cow

• For every one cow there are 3 chickens.

• There are 4 total animals.

Multiple Choice

Ms. Patten has 20 soccer balls and 12 cones. What is the ratio of cones to soccer balls in simplest form?

• 20 to 12

• 20 to 32

• 5 to 3

• 3 to 5

Multiple Choice

For every 20 markers there are 5 pencils. What is the ratio of markers to pencils?

• 4/1

• 5/20

• 4:5

• 1:4

Multiple Choice

Simplify 14:12

• 7 to 6

• 7 to 2

• 6 to 7

• 6 to 1

Multiple Choice

Simplify the ratio of

12 : 14

• 6 to 7

• 2 : 4

• 1 to 4

• 1 to 2

​Using a Part to Part Ratio to find the

Part to Whole Ratio​

The ratio of blue circles to orange circles is 2:3. What is the ratio of blue circles to total circles?​

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The ratio of blue circles to orange circles is 2:3. What is the ratio of blue circles to total circles?​

​In the original ratio, how many BLUE circles are there? 2

In the original ratio, how many TOTAL circles are there? 5​

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The ratio of blue circles to orange circles is 2:3. What is the ratio of blue circles to total circles?​

​In the original ratio, how many BLUE circles are there? 2

In the original ratio, how many TOTAL circles are there? 5​

​So the ratio of Blue circles to Total circles is 2 to 5

Multiple Choice

The ratio of cows to pigs is 2:1. What is the part to whole ratio of cows to total animals?

• 2 to 1

• 1:3

• 2 to 3

• 3:2

Multiple Choice

The ratio of boys to girls is 3 to 7. What is the ratio of girls to total students?

• 7 to 10

• 10 to 3

• 3 to

• 2 to 5