Proportions

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 set up a proportion to solve a problem?

Back

To set up a proportion, you can use the formula a/b = c/d, where a and b are the first ratio, and c and d are the second ratio.

Tags

CCSS.7.RP.A.2C

Front

What is the scale of a map?

Back

The scale of a map is the ratio of a distance on the map to the actual distance it represents in the real world.

Tags

CCSS.7.RP.A.2C

Front

How do you convert map distances to actual distances using a scale?

Back

To convert map distances to actual distances, multiply the distance on the map by the scale factor.

Front

If a map's scale is 1 inch = 3 miles, how would you find the actual distance for 7 inches?

Back

Multiply 7 inches by 3 miles/inch to get 21 miles.

Tags

CCSS.6.RP.A.3B

Front

What is the relationship between time and distance in a rate problem?

Back

In a rate problem, distance is equal to rate multiplied by time (Distance = Rate x Time).

Tags

CCSS.6.RP.A.3B

Front

If a wood stove burns 4 logs in 2 hours, how many logs can it burn in 1 hour?

Back

It can burn 2 logs in 1 hour (4 logs / 2 hours = 2 logs/hour).

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you find the total number of logs burned over a longer period?

Back

Multiply the number of logs burned per hour by the total number of hours.

Tags

CCSS.6.RP.A.3B

Front

What is the formula to calculate speed?

Back

Speed = Distance / Time.

Tags

CCSS.6.RP.A.3B

Front

If Coach Frizzell walks 2 miles in 45 minutes, what is his speed in miles per hour?

Back

His speed is approximately 2.67 miles per hour (2 miles / (45/60) hours).

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2