№1
(5 1/2 + 2 3/5 ) •5/9 = ((5+2)+(1/2 + 3/5))•5/9= (7+ 11/10)•5/9= (7+ 1 1/10)•5/9= (8+ 1/10)•5/9= 8 1/10 •5/9= 81/10 • 5/9=9/2
№2
(7-2 5/16)•4/25= (7- 37/16)•4/25= 75/16 • 4/25= 3/4
№1
(5 1/2 + 2 3/5 ) •5/9 = ((5+2)+(1/2 + 3/5))•5/9= (7+ 11/10)•5/9= (7+ 1 1/10)•5/9= (8+ 1/10)•5/9= 8 1/10 •5/9= 81/10 • 5/9=9/2
№2
(7-2 5/16)•4/25= (7- 37/16)•4/25= 75/16 • 4/25= 3/4