Question

(0,(6)+5 supra 6)x(3 supra 4 - 0.4)+ 1,5x5x(0,8: 3 supra 7)

Answer 1

(6/9+5/6)x((3/4-4/10)+15/10x5x(8/10x7/3)=
=(2/3+5/6)x(3/4-2/5)+15/10 x5 x(4/5· 7/3)=
=9/6 x  7/20 +15/2x 28/15=
=21/40+14=(21+14x40) /40=581/40=14 intregi si 21/40