+0  
 
+4
228
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avatar+1015 

Johnetta simplified 7/9-3/8 ; her work is shown below. Identify where she made her error.

Original division problem 7/9-3/8:

Step 1:  7/9*3/8

 

        Step 2:       \(\frac{7 * 3}{9 * 8}\)

Step 3:  21/72


Step 4: 7/24

 

oPTIONS bELOW 

 

Step 1 think it is 

 

Step 2 

 

Step 3 

 

Step 4 

 

I belive its Step 4 that has a erorr Just wanted to clarify Im like 50%/50% ON THIS 

 Jul 25, 2019
 #1
avatar+1693 
+6

I feel like step one is wrong.

The problem was, 

 

\(\frac{7}{9}-\frac{3}{8} \)

 

and step one multiplys them, which is incorrect.

 

The step reads the problem wrong.

 

Step 4 is correct however.

21/72 simplifys to 

7/24.

 Jul 25, 2019
edited by tommarvoloriddle  Jul 25, 2019
edited by tommarvoloriddle  Jul 25, 2019
 #2
avatar+1015 
+2

Thats true! Thanks 

 

Now a question real quick for you so Step 1 is 

7/9 . 3/8 do you think that means Multiplacation before I take your answer I think the dot Means Multiplucation Thanks! 

 

(: wink

Nickolas  Jul 25, 2019
 #3
avatar+429 
+1

The dot does indicate multiplaction.

HiylinLink  Jul 25, 2019
 #4
avatar+1693 
+5

usally dots in math mean multiplying

 

sometimes decimals, but I dont think here.

tommarvoloriddle  Jul 25, 2019
edited by tommarvoloriddle  Jul 25, 2019
 #5
avatar+1015 
+2

So actually Hectictar just asked me im sure for  7/9-3/8 is the question I looked and it wasint so thanks (THANKS HECTICTAR FOR REMINDING ME) so 7/9 Divided by 3/8 so you think its still 1 

Nickolas  Jul 25, 2019
 #6
avatar+1693 
+5

Yes, because when you divide, you flip the fraction.

You need to flip the fraction in step one, which it doesn't.

tommarvoloriddle  Jul 25, 2019
 #7
avatar+8853 
+4

If the dot is raised like this  ·  it is a multiplication symbol.

If the dot is on the floor like this  .  it is a decimal point.

 

7·8  means  "7 times 8"

7.8  means  "7 point 8"  which is  7  and  8 tenths

 Jul 25, 2019
 #8
avatar+1693 
+6

Which is basically 7 8/10

7 4/5

sorry I wanted to simplify.

tommarvoloriddle  Jul 25, 2019
 #9
avatar+1015 
+2

So it Step 1 Thanks Guys 

Nickolas  Jul 25, 2019
 #10
avatar+1693 
+6

np bro

tommarvoloriddle  Jul 25, 2019

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