5,43+1,72+3,57+4,28=(5,43+3,57)+(1,72+4,28)=9+6=15
5,43+1,72+3,57+4,28 = (5,43+3,57)+(1,72+4,28) = 9+ 6 = 15
5,43+1,72+3,57+4,28=(5,43+3,57)+(1,72+4,28)=9+6=15
5,43+1,72+3,57+4,28 = (5,43+3,57)+(1,72+4,28) = 9+ 6 = 15