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Mathematics 21 Online
OpenStudy (benlindquist):

Medals rewarded. Have some questions

rebeccaxhawaii (rebeccaxhawaii):

on ?

OpenStudy (benlindquist):

the sum of -3/8 and -4/13

OpenStudy (benlindquist):

@rebelbluebeetle

rebeccaxhawaii (rebeccaxhawaii):

okay well you will be adding the two and your answer will be negative

rebeccaxhawaii (rebeccaxhawaii):

first find the common denominator

rebeccaxhawaii (rebeccaxhawaii):

lets use 104

OpenStudy (benlindquist):

24

OpenStudy (anonymous):

-3/8 = 2.6 -4/13 = -0.307692308 i think 2.292307692? im sorry im no good at math :(

rebeccaxhawaii (rebeccaxhawaii):

thats no right

rebeccaxhawaii (rebeccaxhawaii):

not

OpenStudy (benlindquist):

me either

rebeccaxhawaii (rebeccaxhawaii):

ill explain

OpenStudy (benlindquist):

is the answer -9/64

rebeccaxhawaii (rebeccaxhawaii):

no it is not

rebeccaxhawaii (rebeccaxhawaii):

so you got the LCD which is 64 because both 8 and 13 can go into it evenly

OpenStudy (benlindquist):

ok

rebeccaxhawaii (rebeccaxhawaii):

\[-\frac{ 24 }{ 64 }-\frac{ 16 }{ 64 }=?\]

rebeccaxhawaii (rebeccaxhawaii):

so add the top two and the bottom remain 64

rebeccaxhawaii (rebeccaxhawaii):

remember your answer will be negative

OpenStudy (benlindquist):

40/64 = 20/25

OpenStudy (benlindquist):

-20/25

rebeccaxhawaii (rebeccaxhawaii):

recheck your math whats 64 divided by 2

OpenStudy (benlindquist):

32

rebeccaxhawaii (rebeccaxhawaii):

indeed good job

OpenStudy (benlindquist):

but then its not showing up on my paper. the other possible answers are -2 7/24

OpenStudy (benlindquist):

3/8

OpenStudy (benlindquist):

27/24

OpenStudy (benlindquist):

-9/64

OpenStudy (benlindquist):

or -1

rebeccaxhawaii (rebeccaxhawaii):

it would be 5/8

OpenStudy (benlindquist):

ok

rebeccaxhawaii (rebeccaxhawaii):

\[\frac{ 40 }{ 64 }=\frac{ 5 }{ 8 }\]

OpenStudy (benlindquist):

✌🏻

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