>>13341248I mean she's not wrong but calculating a square takes longer especially for young students unfamiliar.
yes I see a square of (a + b)(c + d)
and quickly see ac+ad+bc+bd, but all you've done is create more work.
whereas the first method is exactly just (35)(10+2) which is just simple distribution which is much faster.
you can quickly see 350 + 70 = 420
instead of the (30 + 5)(10 + 2) = 300 + 50 + 60 + 10 = 350 + 70 = 420 which requires four multiplications and three additions vs 2 multiplications and one addition for something equivalent.
Also this is arithmetic, it's not something I use very much because it doesn't have much use to me.
I don't believe this is real, school usually make math easier for nigs so the wouldn't make it harder, she said something about "area model" it must be an introduction to punnet squares or something.
(12345 * 432) = (10000 + 2000 + 300 + 40 + 5)(400 + 30 + 2)
the problem's difficultly has now grown greatly.
vs
(12345)(400 + 30 + 2) = 4938000 + 370350 + 24690 = 4938000 + 395040 = 5333040
now fuck off reddit nigger
