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Cat face [-1,2(5)+ 0,1(4)] x [12-1,1(5)-1,8(4)] ?

Răspuns :

[-1,2(5)+ 0,1(4)] x [12-1,1(5)-1,8(4)] =
=[-(125-12)/90+ (14-1)/90] x [12-(115-11)/90-(184-18)/90] =
=(-113/90+ 13/90) x (12-104/90-166/90) =
=(-100/90) x (12-270/90) =
=(-10/9) x (12-3) =
=(-10/9) x 9 =
=-10