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

How do you find a missing value in a ratio?

Back

To find a missing value in a ratio, set up a proportion and solve for the unknown value.

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 unknown value.

Tags

CCSS.7.RP.A.2C

Front

If the ratio of boys to girls is 3:4, how many boys are there if there are 28 girls?

Back

There are 21 boys. (Set up the proportion: 3/4 = x/28, cross-multiply to find x = 21.)

Tags

CCSS.7.RP.A.3

Front

What is the missing number in the ratio 5:___ = 15:45?

Back

The missing number is 15. (Set up the proportion: 5/x = 15/45, cross-multiply to find x = 15.)

Front

If a ratio table shows 2:5 and 4:___, what is the missing value?

Back

The missing value is 10. (The ratio doubles, so 5 doubles to 10.)

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