SOLUTION: 3 - 3 * 6 + 2 = That is 3 subtract 3 multiplied by 6 add 2 equals I worked it out originally as -17 then by BODMAS as -13 I am now being told it should be 17 I have tried o

Algebra ->  Finance -> SOLUTION: 3 - 3 * 6 + 2 = That is 3 subtract 3 multiplied by 6 add 2 equals I worked it out originally as -17 then by BODMAS as -13 I am now being told it should be 17 I have tried o      Log On


   

Question 1019550: 3 - 3 * 6 + 2 = That is 3 subtract 3 multiplied by 6 add 2 equals
I worked it out originally as -17 then by BODMAS as -13 I am now being told it should be 17 I have tried online math apps and THEY ALL GIVE THE ANSWER AS - 13 Are my tutors in error here because I think they are ?
Found 2 solutions by richard1234, Theo:
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
It is -13. Multiplication precedes addition/subtraction, so 3 - 3 * 6 + 2 equals 3 - 18 + 2 = -13.

Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
if your original problem is 3 - 3 * 6 + 2, then:

multiply 3 * 6 to get 18.

the expression becomes 3 - 18 + 2.

since 3 - 18 is equal to -15, then your expression becomes -15 + 2.

since -15 + 2 is equal to -13, then your expression becomes -13.

the math apps are right.

the answer is -13.

the rule i know is PEMDAS.

that means to clear parentheses first, then exponents, then multiplication and division, then adding and subtracting.

here's a reference:

http://www.purplemath.com/modules/orderops.htm