This is one of the series' shorter videos. Though the title says adding and subtracting radicals, there is only one example of subtracting radicals. Straight forward and clear--he makes it look easy. (02:25)

The instructor returns to the outdoors and continues his discussion from parts 40 and 41 on exponents and radicals. The instructor speeds up the video while he is writing, but not speaking. (09:41)

In this Language of Mathematics video the instructor uses a chalkboard to demonstrate the rules for addition and subtraction with exponents and radicals. He uses real world examples to prove his points.

The instructor remains outside; his board is a concrete wall. In this session, he moves into operations with exponents and radicals, specifically multiplication and division. (10:55)

Continuing from Parts 40, 41, and 42, the instructor discusses the 'language' of exponents and radicals. The instructor is outside using a concrete wall.

This is the last segment of this portion of this Series II discussion of exponents and radicals. The instructor is outdoors writing on a colored concrete wall. (The streets of Vancouver (his home) will soon be filled with his math equations.)

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