(0,3)+3/7+(-0,5)×3/4+(-1)×6

1.-0,5*3,4=-5/10*3/4=-15/40=-3/8 2.-1*6=-6 3.3/10+3/7=21/70+30/70=51/70 4.51/70+(-3/8)=408/560+(-210/560)=198/560=99/280 5.99/280+(-6)=-5 280/280-99/280=-5 181/280