Once again, the instructor is outside with a big piece of chalk and a concrete wall in a parking garage, discussing how to reduce fractions. In spite of the distraction of the background noise (sirens, garbage truck), the instruction is good. (06:30)

In this video, the instructor shows how to multiply and divide fractions. After the video was made, the instructor added this: [NOTE: Correction to this problem. Youtuber LddStyx pointed out that I forgot to "kill a 7 in the breakdown of 35" so the f...inal answer to this question should be 143/12 ... Thank you, LddStyx, for the good eye.] (09:00)[more]

The instructor explores how to add and subtract fractions by demonstrating on a large concrete wall outside. He starts off with simpler fractions. (07:17)

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