MGSE.6.RP.1 Ratios

​Ratios

Subject | Subject

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​Standard

​Understand the concept of a ratio and use ratio language to describe a ratio relationship between two quantities. For example, “The ratio of wings to beaks in the bird house at the zoo was 2:1, because for every 2 wings there was 1 beak.” “For every vote candidate A received, candidate C received nearly three votes.”

Subject | Subject

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​Learning Targets

I can define ratio.​

I can describe ratios as relating parts to a whole.

I can describe ratios as relating parts to parts.​

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​Vocabulary

​Ratio - compares two different quantities

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Subject | Subject

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A ratio compares two different quantities

Ratio

• How many stars are there?

• How many hearts are there?

Fill in the Blank

How many stars?

Fill in the Blank

How many hearts?

You can write this ratio as

• 6 to 9

• or

• 6:9

I can also compare them the other way

• What is the ratio of hearts to stars?

• 9:6

Multiple Choice

• 11:15

• 15:11

• 13:12

• 5:12

Multiple Choice

• 2:3

• 2:1

• 1:2

• 3:2

Multiple Choice

• 6:13

• 7:4

• 6:4

• 13:6

We can also simplify ratios like we do fractions

• 6:9 becomes

• 2:3

​I know the difference between a part-to-part and a part-to-whole ratio

Multiple Select

If you have 2 green apples and 5 red apples, which of the following would be a part to part ratio? SELECT ALL THAT APPLY

• 2:5

• 2:7

• 5:2

• 7: 5

Multiple Choice

There are three red flowers, two pink flowers, and one yellow flower. Which of the following shows a part to whole ratio?

• 3 red flowers to 1 yellow flower

• 1 yellow flower to 2 pink flowers

• 3 red flowers to 2 pink flowers

• 2 pink flowers to 6 total flowers

Multiple Choice

We have 10 pepperoni pizzas

We also have 12 cheese pizzas.

Which of the following uses the correct ratio language for a PART to WHOLE ratio

• For every 10 pepperoni pizzas there are 12 cheese pizzas.

• For every 10 pepperoni pizzas there are 22 total pizzas

• For every 12 pepperoni pizzas there are 10 cheese pizzas

Poll

Learning Goal 1:

How do you feel about knowing the definition of a ratio?

• Not Great,

  I can't describe a ratio

• I Feel Ok,

  I can kinda explain it

• I Feel Great,

  I can explain the definition of a ratio!

Poll

Learning Goal 2:

I can name the 3 ways to write a ratio

• I do NOT know all three ways

• I get most of them, but I need more practice!

• I can DEFINITELY write a ratio in three different notations