13 – 6 + 4 i need because there is a big math test coming up at my school and i need to study for it.

First you would follow the Order Of Operations:
Parenthesis
Exponent
Multiplication
Division
Addition
Subtraction 
Second step: You will add 6 and 4 together since addition came before subtraction in the Order Of Operations.You would get 10.
Your equation should now look like: 13-10.
Last step: You would subtract 10 from 13 since there are no other numbers
Your answer should then be: 3
HOPE THIS HELPS! ^_^

The answer is 3 because 6+4=10
And 13-10=3

Hey, can you post the problem?