What is the value of the expression?
6 • [(32 − 8) ÷ 4 + 2]

- anonymous

What is the value of the expression?
6 • [(32 − 8) ÷ 4 + 2]

- jamiebookeater

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- anonymous

- butterflydreamer

solve what's in the brackets first!
(32 - 8) = ?

- OnePieceFTW

Order of operations say to do parentheses first.

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## More answers

- anonymous

24

- butterflydreamer

Good and now 24 divided by 4 = ?

- anonymous

= 6

- butterflydreamer

correct! Now add 2 .
6 + 2 =?

- anonymous

=8

- butterflydreamer

yep and now, multiply by 6 and you're done :)

- anonymous

can you help me with a few mor like this

- anonymous

so the answer is 78

- butterflydreamer

Sure. I've noticed that you've been posting similar questions though. Just remember the order of operations and BODMAS and you'll be fine :)
And that is not quite the answer.
6 times 8 = ?

- anonymous

oh = 48

- anonymous

im sorry

- butterflydreamer

that's correct :)
Also, if you don't understand BODMAS, it's the same as PEMDAS
http://prntscr.com/86271w
<- super helpful reference with order of operations!

- anonymous

ok so you can help me with two more qestions right

- OnePieceFTW

BODMAS was before we added exponents to the mnemonic

- anonymous

Which placement of grouping symbols in the expression gives it a value of 22?
3 • 4 – 2 + 5 +7
A.
3 • [4 – (2 + 5) + 7]
B.
(3 • 4) – [2 + (5 + 7)]
C.
[(3 • 4) – 2] + (5 + 7)
D.
3 • (4 – 2) + (5 + 7)

- anonymous

thats the nest one

- mathstudent55

Try each choice using the correct order of operations, and see which one gives you the answer you need.

- anonymous

ok

- mathstudent55

What does the O mean in BODMAS?

- anonymous

##### 1 Attachment

- mathstudent55

The way to do a problem like this is to do one step at a time and writing everything else each step. Of course, you need to follow PEMDAS for each step.
6 • [(32 − 8) ÷ 4 + 2] =
= 6 • [24 ÷ 4 + 2]
= 6 • [6 + 2]
= 6 • 8
= 48
By writing everything each step, you don't forget any operation.

- mathstudent55

Also, it is important to understand PEMDAS properly.
Most people don't know how it works.

- mathstudent55

@jpharper
Let's work through each choice of the second problem.

- anonymous

ok

- mathstudent55

A.
3 • [4 – (2 + 5) + 7] =
Innermost parentheses first:
= 3 • [4 – 7 + 7]
We still have the square parentheses, so we do that next.

- anonymous

ok

- mathstudent55

Inside the square brackets, we have a subtraction and an addition.
In PEMDAS, AS means addition, Subtraction.
Those two operations are the same level of priority, so we do them in the order they appear from left to right.
= 3 • [-3 + 7]
= 3 • 4
= 12

- anonymous

this is the answer [(3 • 4) – 2] + (5 + 7)

- mathstudent55

This is what I meant by understanding PEMDAS properly.
Do operations of each line before the next line below.
P - parentheses
E - exponents
MD - multiplications and divisions in the order they appear from left to right
AS - additions and subtractions in the order they appear from left to right

- mathstudent55

Many people think that PEMDAS means doing the operations in the order below, but that is incorrect.
P - parentheses \
E - exponents \
M - multiplications \
D - divisions / The PEMDAS shown to the left is incorrect.
A - additions /
S -subtractions /
The correct order is what I wrote in the previous response above with MD in one line and AS in one line.

- mathstudent55

Yes, you are correct.

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