Question

-1,5+[-0,58(3)+0,8(3)]:(-0,08(3)) Dau coroana

Answer 1

0,58(3)=(583-58)/900 = 525/900=21/36=7/12
0,8(3)=(83-8)/90 = 75/90=5/6
0,08(3)=(83-8)/900 = 75/900=1/12 

-1,5+[-0,58(3)+0,8(3)]:(-0,08(3)) =
=-1,5+(-7/12+5/6):(-1/12)=
= -1,5+(-7+10)/12 ×(-12)=
= -1,5-3=
=-4,5