Ratios and Proportions Pre-Algebra Ch. 6

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

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 the terms and then solve for the unknown variable.

Tags

CCSS.7.RP.A.2C

Front

If 10/25 = a/5, what is the value of a?

Back

a = 2.

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

Front

How many hours do lions sleep in a day if they sleep 5 out of every 6 hours?

Back

Lions sleep 20 hours per day.

Tags

CCSS.4.NF.B.4B

CCSS.4.NF.B.4C

Front

What is the cost per ticket if the drama club pays $144.50 for 17 tickets?

Back

The cost per ticket is $8.50.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If 2 buses carry 64 people, how many buses are needed for 150 people?

Back

5 buses are needed.

Tags

CCSS.6.RP.A.3B

Front

What does it mean to cross-multiply in a proportion?

Back

Cross-multiplying means multiplying the numerator of one ratio by the denominator of the other ratio.

Tags

CCSS.7.RP.A.2A

Front

If z/6 = 35/42, what is the value of z?

Back

z = 5.

Tags

CCSS.7.RP.A.3

Front

What is the relationship between ratios and fractions?

Back

Ratios can be expressed as fractions, where the first quantity is the numerator and the second quantity is the denominator.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2