Is This New Math? I Can't Understand Anything! Coli Certs Holders Explain
- Thread starter froggle
- Start date
awkwardblackgirl
Shakara
360crazy
360crazy please say the crazy!
R.E.N. Spells Ren
Veteran
Is this how they're teaching math now? I don't think I like it, but that's another convo...
What they're doing is simple: they're adding in increments to bring you to numbers where the math is easy. For this simple problem it's more complicated than the old way, but for a harder example it teaches kids how to approach it.
13,776 - 8,913
8913 + 2 = 8915
8915 + 5 = 8920
8920 + 80 = 9000
9000 + 1000 = 10000
10000 + 3000 = 13000
13000 + 700 = 13700
13700 + 70 = 13770
13770 + 6 = 13776
Add up the numbers after the plus sign: 2+5+80+1000+3000+700+70+6 = 4,863
Thus, 13,776 - 8,913 = 4,863
....
Now, the better at math you become, the more of those steps you can combine, so it's fewer steps, but the point is to teach kids how to reason through large number arithmetic. Kids often see large numbers and throw their hands up, but the decimal system makes even large numbers fairly simple to add/subtract
What they're doing is simple: they're adding in increments to bring you to numbers where the math is easy. For this simple problem it's more complicated than the old way, but for a harder example it teaches kids how to approach it.
13,776 - 8,913
8913 + 2 = 8915
8915 + 5 = 8920
8920 + 80 = 9000
9000 + 1000 = 10000
10000 + 3000 = 13000
13000 + 700 = 13700
13700 + 70 = 13770
13770 + 6 = 13776
Add up the numbers after the plus sign: 2+5+80+1000+3000+700+70+6 = 4,863
Thus, 13,776 - 8,913 = 4,863
....
Now, the better at math you become, the more of those steps you can combine, so it's fewer steps, but the point is to teach kids how to reason through large number arithmetic. Kids often see large numbers and throw their hands up, but the decimal system makes even large numbers fairly simple to add/subtract
If you can do the new math in your head then I can see this being useful. If you have a pencil and paper anyway: the old math is still easier... GOT DAMMIT MAN you STILL have to add up the column of numbers... SOHH if you can't do old math then you can't add the column of numbers. Nahmean. This is why we are number 35 instead of number 1. Bullsh't shortcuts.
nikkaaaaaawho remembers
Taking it backnikkaaaaaa
I don't understand why you added 2 to 8913? Why 2 and then why add 5 to the other number? If I can understand that I might be good. Oh and why did you add 80?
The old fashioned way doesn't require only one step though..So in 4 steps, you get an answer you could have gotten in 1…
pointless.
R.E.N. Spells Ren
Veteran
The goal is to get to an 'easy' number, 9000.
If you knew that 8913 + 87 = 9000 then you can just do that, otherwise you do it in more steps.
Supposedly it is to provide kids an opportunity to "think outside the box" and find new ways to explain math.
Ya'll get it?