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Mathematics 22 Online
OpenStudy (anonymous):

3/5-1/4

OpenStudy (anonymous):

using subtraction

OpenStudy (curry):

7/20

OpenStudy (lalaly):

12/20 -5/20 = 7/20

OpenStudy (anonymous):

can you show me the operation for this answer

OpenStudy (curry):

well u need to find lcd least common denominator

OpenStudy (curry):

which is 20

OpenStudy (anonymous):

20right?

OpenStudy (curry):

yep

OpenStudy (curry):

so 3*4=12 1*5=5 5*4=20 4*5 =20

OpenStudy (curry):

so 12 -5 = 7 7/20 dont froget medal

OpenStudy (anonymous):

ok thx

OpenStudy (anonymous):

for this problem 7/8-2/7 would the denominator be 28 or 48 ?

OpenStudy (anonymous):

The LCD of 7/8 and 2/7 would be 56.

OpenStudy (anonymous):

would it be 14/56

OpenStudy (anonymous):

can you explain this operation

OpenStudy (curry):

nope

OpenStudy (curry):

it would be 49- 16

OpenStudy (curry):

so 33 / 56

OpenStudy (anonymous):

err 7/8 = 49/56 2/7 = 16/56 Therefore 7/8 - 2/7 would be 49/56 - 16/56

OpenStudy (anonymous):

these steps would also work for 1/2- 1/3

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