Over at Pharyngula PZ had a post about Tucker Carlson and some guy mocking algebra, describing it as just inserting letters into numerical calculations for no apparent reason, and thinking that we could well do without it. It always amuses me when people take some deep subject and dismiss it as absurd simply because they are ignorant of it or they do not see any sense in it. What kind of mind must they have to so casually dismiss a venerable field of study that has been around for over a thousand years, developed by some of the finest minds, and is a bedrock of mathematics and science?
But I don’t want to waste any time on Carlson and his idiot friend but instead want to look at what algebra is about.
In learning mathematics, the first major stumbling block is fractions. Children find it hard to wrap their minds around fractions, how to add, subtract, divide and multiply them, and even locating them on the number line.
The next stumbling block for students the world over is algebra because it is their first experience with abstract mathematical manipulations. Indeed it is algebra that is the gateway to real mathematics. Up until that point students were doing arithmetic, which is what manipulating specific numbers is, and not mathematics, Mathematics is not about working with numbers (although they do appear) but about relationships between quantities and involve proofs and theorems to get widely applicable general results, all done symbolically using letters and other characters.
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