Suzie 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 50 ÷ 5(3 − 1) − 4
Line 2 50 ÷ 5(2) − 4
Line 3 50 ÷ 10 − 4
Line 4 5 – 4
Line 5 1

Question

Suzie 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	50 ÷ 5(3 − 1) − 4
Line 2	50 ÷ 5(2) − 4
Line 3	50 ÷ 10 − 4
Line 4	5 – 4
Line 5	1

anonymous · Answer

Well if we use the PEMDAS method it would go like this
50 / 5 (3-1) -4
(parentheses) 
50 divided by 5 (2) - 4
(exponents) there are none
multiplication is where it gets tricky.
In this case we are actually going to do
50 divided by 5 *and then* multiply the 2
so 10 • 2 = 20 - 4
and 20-4 is of course 16 
:)