Rounding to the Nearest Hundred Using a Number Line

This lesson teaches how to round numbers to the nearest 100 using a number line. It explains benchmark numbers, midpoints, and common mistakes in rounding. The lesson provides examples to illustrate the concepts and concludes with a summary of the key points.

What are benchmark numbers and how do they relate to rounding?

Explain the concept of a midpoint in relation to rounding numbers.

How do you determine whether to round up or down when using a midpoint?

Using the number 349, describe the rounding process to the nearest 100.

What is the result of rounding 1,472 to the nearest 100 and why?