Rounding and Estimation Concepts

The video tutorial explains how to estimate a town's population in 2010 by rounding the 1995 population and the population increase to the nearest hundred before adding them. The 1995 population of 11,256 is rounded up to 11,300, and the increase of 4,312 is rounded down to 4,300. These rounded numbers are then added to estimate the 2010 population as 15,600.

What was the initial population of the town in 1995?

• 12,000

• 11,000

• 10,000

• 11,256

By how much did the population increase by 2010?

• 4,000

• 3,000

• 5,000

• 4,312

To what number is 11,256 rounded when approximating to the nearest hundred?

• 11,500

• 11,000

• 11,300

• 11,200

What is the rule for rounding a number when the tens digit is 5 or greater?

• Round down

• Round up

• Double the number

• Keep the same

What is the rounded value of 4,312 to the nearest hundred?

• 4,200

• 4,300

• 4,500

• 4,400

When rounding 4,312, why do we round down?

• Because the number is less than 5,000

• Because the units digit is 2

• Because the hundreds digit is 3

• Because the tens digit is 1

What is the sum of the rounded numbers 11,300 and 4,300?

• 15,600

• 15,500

• 15,800

• 15,700

What is the purpose of rounding numbers before adding them in this context?

• To get an exact number

• To reduce the population

• To confuse the students

• To make calculations easier

What is the final estimated population of the town in 2010 after rounding and adding?

• 15,700

• 15,600

• 15,800

• 15,500

Why is it important to place a comma in large numbers?

• To make them look bigger

• To make them easier to read

• To separate thousands from hundreds

• To follow mathematical rules