Вычислите:-21 7/20+27 3/8 черта (-1 23/28+3 4/7)-(-29/130+1 47/65)

1) 23.275
2) -1.574175824

1) -427/20 + 219/8 = (-854+1095)/40 = 241/40
2) -51/28 + 25/7 = (-51+100)/28 = 49/28
3) -29/130 + 112/65 = (-29+224)/130 = 195/130 = 39/26
4) 49/28 - 39/26 = (1274-1092)/728 = 182/728 = 1/4
5) 241/40 : 1/4 = (241*4)/40*1 = 241/10 = 24 1/10 = 24,1
Ответ: 24,1