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Mathematics 9 Online
OpenStudy (anonymous):

1/40 + 1/18 =

OpenStudy (anonymous):

find a common denominator

OpenStudy (anonymous):

try using the LCM for 40 and 18. do you understand what the LCM is?

OpenStudy (anonymous):

No not really

OpenStudy (anonymous):

its going to be 360 for CD

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

multiply 40 * 9 and 18 * 20

OpenStudy (anonymous):

9/360

OpenStudy (anonymous):

20 / 360

OpenStudy (anonymous):

= 29/360

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