1) = 4/5 • ( 3 7/8 - 1 5/8 ) = 4/5 • 2 1/4 = 4/5 • 9/4 = 9/5 = 1 4/5 = 1,8
•••••••
2) = 1 13/14 • ( 4 7/9 - 3 7/12 + 1 13/18 ) = 1 13/14 • ( 4 14/18 + 1 13/18 - 3 7/12 ) = 1 13/14 • ( 5 27/18 - 3 7/12 ) = 1 13/14 • ( 6 1/2 - 3 7/12 ) = 1 13/14 • ( 6 6/12 - 3 7/12 ) = 1 13/14 • ( 5 18/12 - 3 7/12 ) = 1 13/14 • 2 11/12 = 27/14 • 35/12 = 35/56 = 5/8