ВЫПОЛНИТЕ ДЕЙСТВИЕ: 21/33 + 13/44 - 26/55 = ?

Question

ВЫПОЛНИТЕ ДЕЙСТВИЕ: 21/33 + 13/44 - 26/55 = ?

Answer 1

21/33 :(3) + 13/44 :(4) - 26/55:(5) = 7/11 + 3,25/11 - 5,2/11 = 1/11(7+3,25-5,2)=1/11х5,05=1/11 х 505/100 = 505/1100 = 1/2