Cheryl T.

asked • 03/17/15

What is the correct order for solving 20/2(5+5)=

 What is the correct order for solving 20/2(5+5)=
 

Sean S.

So is it 1 or 100?
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12/21/15

1 Expert Answer

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Olubunmi B. answered • 03/17/15

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Pemdas 
 
1.parenthesis
2.exponents
3.multiplication
4. division
5. addition
6. subtraction
 
So..(5+5)..paranthesis first=10
20/2=10..division next
10*10=100.multiplication last
 
answer equals 100
 
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Jay J.

Wrong. 
PEMDAS is just an acronym ... 20/2(5+5) is 100. (5+5)= 10 .. You divide first because Multiplication and Division in PEMDAS goes together which ever comes first left to right so 20/2 is 10 .. 10*10=100. 
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03/17/15

Olubunmi B.

Thanks Jay, you are so right!
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03/17/15

Brownie B.

Jay is wrong. There is no exception to the rules. P(parenthesis first!). 
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03/19/15

Jon C.

20/2(5+5)  = 40
 
remove the 5 & add one to it. Just do it
 
6 * 5 = 30 + (2/20) = 40
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03/20/15

Michael C.

20/2a=?
a=(5+5)=10
2a=2x10=20
20/2a=20/20=1

20/2xa=?
a=(5+5)=10
20/2=10
10x10=100

20/2a is not 20/2xa
20/2(5+5) is not 20/2x(5+5)

a computer calculator should be reprogramed.
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03/21/15

Michael C.

20/2a=?

a=(5+5)=10

2a=2x10=20

20/2a=20/20=1

 

20/2xa=?

a=(5+5)=10

20/2=10

10x10=100

 

20/2a is not 20/2xa

20/2(5+5) is not 20/2x(5+5)

 

20/2(5+5)=1

20/2x(5+5)=100

 

a computer calculator should be reprogrammed.
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03/21/15

Ryan H.

Use PEMDAS
Euation 20/2(5+5)
P ( ) 5+5=10 , P ( ) comes first
MD (left to right) 20/2=10 , In this case Division comes second 
MD (Left to right) 10x10=100 , Then in this case Multiplication comes last
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03/23/15

Steve F.

You are all forgetting the distributive property distribute the 2 to the 5s first
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09/17/15

Alexandra J.

The distributive property makes it multiplication. So you'd still divide 20/2 first then multiply 10 and 10.  
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12/26/15

Dustin W.

The answer is 1.
20/2 (5+5)
First, parentheses= 5+5=10. Easily established.
Next, we still have to get rid of the parentheses. 2(10). We need to distribute the 2 to everything in the parentheses, so, 10 distributed twice is 20. 
Now, we simply solve. 20/20. A nber devised by itself equals 1, so...
20/2(5+5).
That's all it is. :3
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03/27/17

Lynn P.

 The answer is 1,  it is simple mathematics.  PEMDAS -- 20/ 2(5+5)= 1 all day long in any math class.
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03/29/17

B G.

Give this question to your potential Algebra tutor.  If they say "1"- don't hire them.
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03/30/17

Georgia F.

Why are you doing division before multiplication 
I'm PEMDAS
 
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09/07/17

Colin H.

The issue is people are not understanding 2(5+5) isn't multiplication. Its a distribution. Its the same thing as 2a and a=(5+5). What matters is how you write it. if you write it as 20/2*(5+5) then its not a distribution and its multiplication and the answer would be 100. The people saying you do division and multiplication from left to right are correct. But they are leaving out that before you start applying division and multiplication you must first distribute all the values. There are two ways to solve a distribution. You can add the 5's and then multiply them by 2 or you can multiply each 5 by 2 and then add them together. So you can do 2(5+5) = (2*5 + 2*5) = 20 or you can do 2(5+5) = 2(10) = 20. THEN you do 20 / 20 to get 1. The answer is 1!
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04/02/18

Joshua B.

I don’t understand how it’s going to be 100 if multiplication is before division it equals out to 1
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08/18/19

JaCole J.

PEMDAS = Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction equation : 20/2(5+5) so you do what’s in the parentheses first. which is (5+5), so it equals 10 . then you multiply it by 2 , you’d get 20. finally you divide 20/20 which would equal 1. so the answer is 1.
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03/25/20

Wayne B.

M and D have the same priority and are done as they occur left-to-right A and S have the same priority and are done as they occur left-to-right
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03/09/21

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