Question

find the sum using suitable properties
(-13)/20+11/14+(-5)/7+7/10​

Answer 1

Answer:

$your \: answer \: is \: in \: attachment$

Answer 2

Answer:

4/5+11/7+(−7/5)+(−2/7)

=4/5+(−7/5)+11/7+(−2/7)

={4+(−7)}/5+{11+(−2)}/7

=(4−7)/5+(11−2)/7

On further calculation, we get,

=−3/5+9/7

Now, taking L.C.M. we get,

=(−21+45)/35

=24/35.