Sarah worked the following problem incorrectly.

Part 1) In which line was the mistake made?
Part 2) Show your work and give the correct answer?

Line 1 40 ÷ 5(3 − 1) − 4
Line 2 40 ÷ 5(2) − 4
Line 3 40 ÷ 10 − 4
Line 4 4 − 4
Line 5 0

Question

Sarah worked the following problem incorrectly. 

Part 1) In which line was the mistake made? 
Part 2) Show your work and give the correct answer? 



Line 1 40 ÷ 5(3 − 1) − 4 
Line 2 40 ÷ 5(2) − 4 
Line 3 40 ÷ 10 − 4 
Line 4 4 − 4 
Line 5 0

reemii · Answer

what are you supposed to obtain? 12 ?

anonymous · Answer

I Think so

reemii · Answer

It's a problem of parenthesis, or something called "precedence" (spelling ok?:/)
The problem is in "40 divided by 5 times 2".

reemii · Answer

The rule is : (40/5)*2 and not 40/(5*2)

anonymous · Answer

okay love so the wrong line is 2 
?

reemii · Answer

the error is then on line 3 (from line 2 to line 3 )

anonymous · Answer

okay thank you sweety

reemii · Answer

yw