Question

Rose 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 30 ÷ 5(3 − 1) − 4
Line 2 30 ÷ 5(2) − 4
Line 3 30 ÷ 10 − 4
Line 4 3 − 4
Line 5 −1

Answer 1

neeed help plzzzzzz

Answer 2

can anyone help me?!?!?!?!

Answer 3

can someone plase help me??????????

Answer 4

anyone?

Answer 5

Rose takes a very very correct approach. But you don't. I told you before.

Answer 6

It's line 3, the correct answer would be \[30\div5(2)-4\]\[30\div5\] then to do:
\[5(2)\]

Answer 7

i'm not sure of this one - wolfram gives the answer = 8
it does the division 30/5 first = 6
then 6*2 - 4 = 8

Answer 8

i'm confused!!!

Answer 9

@hartnn - whats your opinion on this?

Answer 10

my opinion is that this is why god created the fractional division symbol :P

Answer 11

oki, time for me to step in here. The correct way for this problem to be solved is this:
Step 1, parenthesis
\[30 ÷ 5(3 − 1) − 4\]\[30\div5(2)-4\]Step 2, Exponets, but there aren't any, so lets skip that step
Step 3, Multiplication/division
\[30 ÷ 5(3 − 1) − 4\]\[6(2)-4\]\[12-4\]
Step 4, addition/subtraction:
\[21-4\] \[8\]
to remember these steps try this:
Parenthesis Please
Exponets Excuse
Multiplication My
Division Dear
Addition Aunt
Subtraction Sally

Answer 12

it should be 8,
30÷5(2)-4 is same as 30÷5*2 -4
while evaluating such expressions, where there is equal priority to ÷ and * , we always go from left to right.
so 12-4=8

Answer 13

aahh yes

Answer 14

what confused me was the 5(2) - i was considering that to be the parentheses part