why should we learn maths
Answers
cringe when hearing "Math teaches you to think".
It's a well-meaning but ineffective appeal that only satisfies existing fans (see: "Reading takes you anywhere!"). What activity, from crossword puzzles to memorizing song lyrics, doesn't help you think?
Math seems different, and here's why: it's a specific, powerful vocabulary for ideas.
Imagine a cook who only knows the terms "yummy" and "yucky". He makes a bad meal. What's wrong? Hrm. There's no way to describe it! Too mild? Salty? Sweet? Sour? Cold? These specific critiques become hazy variations of the "yucky" bucket. He probably wouldn't think "Needs more umami".
Words are handholds that latch onto thoughts. You (yes, you!) think with extreme mathematical sophistication. Your common-sense understanding of quantity includes concepts refined over millenia (zero, decimals, negatives).
What we call "Math" are just the ideas we haven't yet internalized.
Let's explore our idea of quantity. It's a funny notion, and some languages only have words for one, two and many. They never thought to subdivide "many", and you never thought to refer to your East and West hands.
Here's how we've refined quantity over the years:
We have "number words" for each type of quantity ("one, two, three... five hundred seventy nine")The "number words" can be written with symbols, not regular letters, like lines in the sand. The unary (tally) system has a line for each object.Shortcuts exist for large counts (Roman numerals: V = five, X = ten, C = hundred)We even have a shortcut to represent emptiness: 0The position of a symbol is a shortcut for other numbers. 123 means 100 + 20 + 3.Numbers can have incredibly small, fractional differences: 1.1, 1.01, 1.001...Numbers can be negative, less than nothing (Wha?). This represents "opposite" or "reverse", e.g., negative height is underground, negative savings is debt.Numbers can be 2-dimensional (or more). This isn't yet commonplace, so it's called "Math" (scary M).Numbers can be undetectably small, yet still not zero. This is also called "Math".