Question

Using appropriate properties of addition , find the sum :- 3/7+4/9+(-5/21)+2/3​

Answer 1

Answer:

3/7+4/9+(−5/21)+2/3

=3/7+(−5/21)+4/9+2/3

On simplifying, we get,

={9+(−5)}/21+(4+6)/9

=4/21+10/9

Taking L.C.M. we get,

=(12+70)/63

=82/63

=1

63

19

.