45:5+54:6-(54+45):(4+5)

Răspuns :

45:5 + 54:6 - ( 54+ 45) : ( 4+5) =
9 + 9 - 99:9 =
18 - 11 =
7
45:5+54:6-(54+45):(4+5)=
9+9-99:9=
18-11=7