Rates

Front

What is a rate?

Back

A rate is a ratio that compares two different quantities, often expressed as a quantity per unit of time, such as speed (miles per hour) or production (items per day).

Front

How do you calculate a rate?

Back

To calculate a rate, divide the total quantity by the total time or number of units. For example, if a farm produces 1,200 eggs in 30 days, the rate is 1,200 eggs ÷ 30 days = 40 eggs per day.

Front

What is the rate of eggs produced if a farm produces 1,200 eggs in 30 days?

Back

40 eggs per day.

Front

If a grocery store sells 48 watermelons in 6 hours, what is the rate of watermelons sold per hour?

Back

8 watermelons per hour.

Front

What is the lap rate of a hamster that runs 1,620 laps in 9 hours?

Back

180 laps per hour.

Front

How do you find the rate of an activity over time?

Back

To find the rate of an activity over time, divide the total amount of the activity by the total time taken. For example, if a student sharpens 5,400 pencils in 45 hours, the rate is 5,400 pencils ÷ 45 hours = 120 pencils per hour.

Front

What is the sharpening rate if a student sharpens 5,400 pencils in 45 hours?

Back

120 pencils per hour.

Front

If a student chews 2,310 pieces of gum over 33 days, what is the gum chewing rate?

Back

70 pieces of gum per day.

Front

What is the formula for calculating rates?

Back

Rate = Total Quantity ÷ Total Time or Units.

Front

Why is understanding rates important?

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Understanding rates helps in making comparisons, analyzing data, and solving real-world problems related to speed, efficiency, and productivity.