Question 966506: I do not know how to start this problem, let alone how to solve it... Please help me.. the problem is 5(7+8)-3/4 x 4(9)
Answer by EdenWolf(517)   (Show Source):
You can put this solution on YOUR website! Hello,
Let's see if I can help.
So, you might know the PEMDAS, or order of operations. If not, then it goes like this:
Parentheses
Exponents
Multiplication or Division
Addition or Subtraction
So first we have to solve everything in the parentheses. 9 we already know is 9, so we leave that. 7+8 is 15, so we have 15 in the parentheses.
5(15)-3/4*4(9)
First, multiply 5 and 15. When you see a number right next to a number in parentheses, that means they are being multiplied. (For example,  .
75-3/4*4(9)
Now divide 3 and 4. We don't subtract because that's not what comes next in the order of operations.
3/4=0.75
So now the expression looks like this:
75-0.75*4(9)
Multiply 0.75 and 4.
75-3(9)
Multiply 3 and 9.
75-27
Finally, subtract 27 from 75.
The answer is 48.
|
|
|
