Addition of Whole Numbers, Part 2: Summary: Addition of Whole Numbers, Part Two
This clip summarizes the process of finding the sum of two or more whole numbers and, in so doing, revisits the use of expanded notation.
Addition of Whole Numbers, Part 2: Three Practical Problems
This clip provides three real-world examples of how the ability to add whole numbers can be useful. The examples include calculating the following: the total number of miles driven during a multi-day trip, the total numb..
Addition of Whole Numbers, Part 2: Three Things to Remember About Addition of Whole Numbers
This clip reviews the key points about adding whole numbers. The first of these is that there are 100 addition facts that need to be memorized. The second is the idea of expanded notation. Third is the notion that, when ..
Addition of Whole Numbers, Part I: 100 Addition Facts, The
This clip explains that there are 100 addition facts that should be learned so that they become as automatic as knowing that the letter "b" comes after the letter "a" in the alphabet.
Addition of Whole Numbers, Part I: Addition Tricks and Hints
This clip presents a variety of hints and tricks that make learning the 100 addition facts simple and automatic. Among these are the identity for addition, and re-grouping addends in the easiest possible order.
Addition of Whole Numbers, Part I: Basics of Addition, The
This clip explains that the basic idea behind adding whole numbers is combining smaller groups--called addends--to form a larger one--known as the sum.
Addition of Whole Numbers, Part I: Order of Addends
This clips explains that, when we add, we can arrange and group the addends in any order we like. The answer will always be the same.
Addition of Whole Numbers, Part I: Summary: Addition of Whole Numbers, Part One
This clip summarizes some of the main ideas that pertain to the addition of whole numbers, including the concept of combining smaller numbers, known as addends, to form a larger number, called the "sum," as well as learn..
Angles, Arcs and Sectors: Angles Formed by Intersecting Lines
This clip looks at angles that are formed by two intersecting lines, in the process explaining what constitutes vertical and supplementary angles.
Angles, Arcs and Sectors: Angles, Circles and Arcs
This clip includes several practical problems in its discussion of angles in circles. It also explains how to find the length of an arc.