Real Numbers (Natural ones) Rock

Posted on March 18, 2015


Trying to get slope intercept form of an equation and the student asks me what gives me the mathematical right to move that five x to the other side.

So I explained about equality… doin’ the same thing to both sides means they’re still the same… but that is a little extra abstract… so I tossed in that 10 + 11 = 21 — and 10 = 21 – 11.   It helped … and it facilitates understanding the abstract.