Curated Video
Assessing the Reasonableness of Sums Using Clustering
In this lesson, students will learn how to assess the reasonableness of addition problems by using clustering. By grouping similar-sized numbers together, they can estimate the sum and check if the actual answer is reasonable. This...
Curated Video
Solving Unknown Amounts Using Addition and Subtraction Fact Families
The video demonstrates how to solve for unknown amounts using addition and subtraction fact families. The teacher explains the concept of fact families and how they can be represented in a triangle. The video provides examples of how to...
Math TV
Math tv.com: Positive and Negative Numbers: Adding
Video demonstrations featuring a teacher and several students will show you how to add positive and negative numbers in order to simplify numerical expressions.