Question

1,(3)•1,2
(-0,8(3))•(-0,75)
(-1,0(6))•1,875

Answer 1

1,(3)•1,2=13-3/9•12/10=10/9•12/10=12/9=4/3

-0,8(3)•(-0,75)=+83-3/90•75/100=80/90•75/100
=8/9•15/20=8/9•3/4=2/3

1,875•(-1,0(6))=-1875/1000•(106-10)/90
=-1875/1000•96/90=-375/200•32/30=
=-15/20•32/30=-3/4•32/30=-32/4•10=-8/10=-4/5