PDA

View Full Version : I have a problem with order of operations



The_Rose
08-28-2005, 08:30 PM
Okay. I get my order of operations mixed up over and over again..which is proably the reason I miss so many of my problems.
Problem one is:
14-16\8+9*5=
I did:
14-2+9*5
12+9
21*5=
105
Problem two is:
10-3(5-2)=
I did:
7*3=
21

Euler
08-28-2005, 09:49 PM
Okay. I get my order of operations mixed up over and over again..which is proably the reason I miss so many of my problems.
Problem one is:
14-16\8+9*5=
I did:
14-2+9*5
12+9
21*5=
105
Problem two is:
10-3(5-2)=
I did:
7*3=
21

Second problem looks good.

First one however, you made a mistake at 14-2+9*5
12+9
21*5=

You multiply first.

You would then get 14-2+9x5

12+45=57

wjm11
08-29-2005, 02:34 AM
The second problem is NOT good:
10-3(5-2)=
I did:
7*3=
21

10-3(5-2)= 10 - 3(3) = 10 - 9 = 1

Multiplication precedes subtraction.