Răspuns :
7 x ( 260 x 4 ) = 7 x 1040 = 7280 ml = 7,28 litri
260 x 4 = 1040 ml lapte consumaa familia intr-o zi
1040 x 7 = 7280 m lapte = 7,28 litri de lapte consuma familia intr-o saptamana
260 x 4 = 1040 ml lapte consumaa familia intr-o zi
1040 x 7 = 7280 m lapte = 7,28 litri de lapte consuma familia intr-o saptamana