Intro to 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 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

What does it mean for two fractions to be equivalent?

Back

Two fractions are equivalent if they represent the same value or proportion, even if they have different numerators and denominators.

Tags

CCSS.4.NF.A.1

CCSS.3.NF.A.3A

CCSS.3.NF.A.3B

Front

If 4/5 = x/20, what is x?

Back

x = 16.

Tags

CCSS.4.NF.A.1

CCSS.3.NF.A.3B

Front

Caleb can drive 15 miles in 1 hour. How many miles can he drive in 3 hours?

Back

45 miles.

Tags

CCSS.6.RP.A.3B

Front

If a recipe requires 2 cups of flour for 4 servings, how much flour is needed for 10 servings?

Back

5 cups of flour.

Tags

CCSS.6.RP.A.3B

Front

What is the cross-multiplication method?

Back

Cross-multiplication involves multiplying the numerator of one fraction by the denominator of the other fraction to find a solution.

Tags

CCSS.5.NF.B.5B

Front

If 3/4 = x/12, what is x?

Back

x = 9.

Tags

CCSS.7.RP.A.2B

Front

Daniel bought 1 star fruit for $2. How much would 5 star fruits cost?

Back

$10.

Tags

CCSS.3.OA.A.3

Front

What is the formula for finding a missing value in a proportion?

Back

If a/b = c/d, then ad = bc.

Tags

CCSS.7.G.A.1