Posted by Meherin on Thursday, March 13, 2008 at 8:53pm.
9 + (8-2)^2 x 20 / 5
9 + 36 * 20/5
9 + 36 * 4 = ??
oh i thought it went like this:
9+(8-2)^2x20/5
9+6^2*20/5
9+36*20/5
9+720/5
9+144=153
u c, my math teacher told me to do it in these steps:
1)do all parantheses first
2)exponents next
3)do all multiplication and division, IN ORDER FROM LEFT TO RIGHT
4)do all addition and subtraction, IN ORDER FROM LEFT TO RIGHT
Here's a good explanation of the order of operations and how to remember them -- for your future problems -- using PEMDAS as a mnemonic:
http://www.purplemath.com/modules/orderops.htm
=)
my math teacher told me not to:
1)do all parantheses
2)exponents next
3)do all multiplication and division, IN ORDER FROM LEFT TO RIGHT
4) do all addition and subtraction, IN ORDER FROM LEFT TO RIGHT
those are the steps i m supposed to use, i just wanted to make sure