Mr. Appledorf's On-Line PowerPoint Math Lessons
Proportions
Objectives:
Students will explain what proportions are and details of how to manipulate them. Students will set proportions up and use them to calculate unknown values.
NCTM Standards:
Students analyze and evaluate the mathematical thinking and strategies of others.
California Content Standards:
(2.0) Students understand and use such operations as finding the reciprocal.
Slides:
* Proportions Defined
* Cross-Multiplication
* What Goes Where
* What Cancels What
* Cancel Units First
* Put Unknown On Top
* Practice
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Mr. Appledorf's On-Line PowerPoint Math Lessons
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In college in the 1960's I discovered that I have a knack for helping people understand technical ideas, and I have used this talent ever since in many contexts, from modeling biological systems using mathematics, to doing research and development in the telecommunications software industry, to tutoring kids and adults in math, to teaching math part-time at several high schools.
