estimate quotients using compatible numbers

Front

What are compatible numbers?

Back

Compatible numbers are numbers that are easy to compute with mentally. They are often rounded numbers that make calculations simpler.

Front

How do you estimate a quotient using compatible numbers?

Back

To estimate a quotient using compatible numbers, round the dividend and divisor to numbers that are easy to divide, then perform the division.

Front

What is the purpose of estimating quotients?

Back

The purpose of estimating quotients is to quickly determine an approximate answer without performing exact calculations.

Front

What is the estimated quotient of 486 ÷ 6 using compatible numbers?

Back

The estimated quotient is about 80.

Front

How can you compare two estimated quotients?

Back

You can compare two estimated quotients by using comparison symbols such as <, >, or = after estimating each quotient.

Front

What is the estimated quotient of 2,805 ÷ 4?

Back

The estimated quotient is greater than the estimated quotient of 3,592 ÷ 6.

Front

What is the estimated quotient of 613 ÷ 3?

Back

The estimated quotient is less than the estimated quotient of 581 ÷ 2.

Front

How do you round numbers to find compatible numbers?

Back

To round numbers for compatible numbers, look for the nearest ten, hundred, or other place value that simplifies the calculation.

Front

What is the estimated daily mileage for Mr. Danielson if he drove 1,998 miles in a week?

Back

He drove about 300 miles each day.

Front

What symbol would you use to compare 364 ÷ 4 and 117 ÷ 6?

Back

You would use the symbol > to indicate that 364 ÷ 4 is greater than 117 ÷ 6.