Răspuns:
1
Explicație pas cu pas:
[2.(3)-1.2]:0.68-0.(6)=
[ (23-2) /9 - 12/10 ] :68/100 - 6/9=
( 21/9 -6/5) : 17/25 - 2/3 =
(7/3 -6/5) : 17/25 - 2/3 =
(7x5-6x3) /15 : 17/25 - 2/3 =
17/15 : 17/25 - 2/3 =
25/15 -2/3 =
5/3 -2/3=
3/3=
