this post was submitted on 07 Jul 2023
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If you don't understand the mechanisms of arithmetic, algebra is going to be a challenge. If you don't understand algebra, lots of other things that are applicable to daily life and trades are also out.
I use geometry and trig for gardening. I do unit conversions (algebra) in cooking. I use simple probablilty in gaming.
All of this comes down to my ability to perform arithmetic operations on abstract symbols. A calculator can give me the numeric results, but it can't help me manipulate the equation to get the answer I need.
Of course. But this is about stuff like multiplication tables and things that are clear calculator fodder.
I can do stuff like 36 * 15 in my head if forced to, but my calculator can do it faster and more reliably then I can.
Also would you ever long divide 7/13 if you needed now? Of course not, use your phone.
Sometimes phones are not accessible. For example, if I'm running I'm not going to pull out my phone to do some basic math to figure out time splits and the pacing. I do that math in my head, including long dividing 7/13 if needed.