Ratios & Ratio Tables

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, showing how many times one value contains or is contained within the other.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you write a ratio?

Back

Ratios can be written in three ways: as a fraction (a/b), with a colon (a:b), or with the word 'to' (a to b).

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is a ratio table?

Back

A ratio table is a table that shows equivalent ratios, helping to visualize the relationship between two quantities.

Front

If the ratio of apples to oranges is 3:4, how many oranges are there if there are 12 apples?

Back

There are 16 oranges. (Set up the proportion: 3/4 = 12/x, solve for x.)

Tags

CCSS.7.RP.A.3

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Tags

CCSS.7.RP.A.2A

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply and then divide to find the missing value.

Tags

CCSS.7.RP.A.2C

Front

Back

x = 9.

Tags

CCSS.4.OA.A.3

Front

What is the missing value in the ratio table if the ratio is 2:5 and one value is 10?

Back

The missing value is 25. (Set up the proportion: 2/5 = 10/x, solve for x.)

Front

If a recipe calls for a ratio of 2:3 of sugar to flour, how much sugar is needed for 15 cups of flour?

Back

You need 10 cups of sugar. (Set up the proportion: 2/3 = x/15, solve for x.)

Tags

CCSS.7.RP.A.3

Front

What does it mean if two ratios are equivalent?

Back

It means they represent the same relationship between quantities, even if the numbers are different.

Tags

CCSS.6.RP.A.3A