Find the value of 35+−76+25+−56.
Re-arranging and grouping the numbers in pairs in such a way that each group contains a pair of rational numbers with equal denominators, we have, (35+25)+(−76+−56) =3+25+(−7)+(−5)6 =55+(−12)6 =1+(−2)=−1
Find the value of (−2 5)7÷(−2 5)6.