Question

Выполните действия 10-(2,1+4 3/4)

Answer 1

10-(2,1+4 3/4) = 5 1/20
1) 2,1+4 3/4 = 2/10+4 3/4 = 4+2/10+3/4 = 4+2·2/10·2+3·5/4·5 =4+4/20+15/20 =
    = 4+4+15/20 = 4 19/20
2) 10 - 4 19/20 = 6-19/20 = 6*20/20-19/20 = 120/20-19/20 = 120-19/20 =
    = 101/20 = 5 1/20