1) (-19/25+2/5*(-0,6))*0,8=(-0,76+0,4*(-0,6))*0,8=(-0,76-0,24)*0,8=-1*0,8= -0,8
2) (2/10-7/15)*(-5/8)-(-5/12-75/100):41/23=(1/5-7/15)*(-5/8)-(-5/12-3/4):41/23=(3-7)/15*(-5/8)-(-5-9)/12:41/23=-4/15*(-5/8)-(-14/12):41/23=1/6+161/246=(41+161)/246=202/246=101/123