Estimation is a good way to build and assess a student's number sense. Watch as Sal uses estimation to solve a problem where he must determine how much 'Janelle' ran during a 4-day period. He calculates the exact amount and compares the...

Sometimes the ones place isn't that important. By watching a short video, learners review how to round numbers to the nearest 10. They first look at rounding whole numbers, both with and without a number line, then move on to rounding...

Demonstrate the concept of rounding decimals through video instruction. The instructor shows examples of rounding to both the tenths and hundredths places.

When rounded up, the resource deserves a score of 100. Viewers of a short video learn how to round numbers to the nearest 100. After reviewing the concept, they first look at examples with whole numbers, then continue on to examples with...

Whole numbers are just so much easier to work with. Scholars watch a short video that reviews how to round decimals to the nearest whole number. They first consider numbers on a number line, then round decimals by looking at the digit in...

Need a review for adding decimals? Make sure to line up the decimals, write in zeros for placeholders, add the numbers, and bring down the decimal. There you have it.

Need a review for adding decimals? Make sure to line up the decimals, write in zeros for placeholders, add the numbers, bring down the decimal. There you have it.

Here's a video that presents several numerical expressions to be evaluated using a calculator.Viewers come to realize that sometimes it is not just a matter of punching in the numbers, but they also need to be concerned about how...

This video shows how to estimate decimal addition in the context of a word problem. Practice problems are available. [3:01]