Question

-2/5 +3/4; -11/27+ 5/18; -4/11-6/11; 5/13-8/13; -1/4- (-2/5): вычеслить дробью

Answer 1

-2/5 +3/4=-8/20+15/20=7/20;
-11/27+ 5/18=-22/54+15/54=-7/54;
-4/11-6/11=-10/11;
5/13-8/13=-3/13;
-1/4- (-2/5)=-5/20+8/20=3/20