Using appropriate property , find (- 4 by 7 × 1 by 2 + 7 by 4 - 1 by 2 × 3 by 7)
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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.
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