Unit Rates with Complex Fractions

Cassandra observes heavy rain and measures the rainfall using a cup over half an hour, finding 9/8 inches of rain. She learns about complex fractions and calculates the unit rate of rainfall per hour by dividing 9/8 by 1/2, resulting in 2 and 1/4 inches per hour. The lesson focuses on understanding and calculating unit rates involving complex fractions.

What did Cassandra use to measure the rainfall?

• A measuring tape

• A bucket

• A cup

• A ruler

What is a complex fraction?

• A fraction with a decimal

• A fraction with a whole number

• A fraction with a fraction in the numerator or denominator

• A fraction with a negative number

Why does Cassandra need to find an equivalent fraction for one hour?

• To measure the total rainfall

• To predict the rainfall rate for one hour

• To compare with other measurements

• To calculate the average rainfall

How do you calculate a unit rate from a complex fraction?

• By dividing the numerator by the denominator

• By subtracting the denominator from the numerator

• By multiplying the numerator and denominator

• By adding the numerator and denominator

What is the unit rate of rainfall Cassandra calculated?

• 1 and 1/8 inches per hour

• 9/8 inches per hour

• 2 and 1/4 inches per hour

• 3 inches per hour