a)2 • 9/4 + 11/5 • 10/11 =
9/2 + 2 =
9/2 + 4/2 =
13/2 =
6 întregi 1/2
b)64/9 + 9/4 - 9/4 =
64/9 =
7 întregi 1/9
c)(2 • 12/7 - 1/3) • 1/4 : (12/5 - 4/3) =
(24/7 - 1/3) • 1/4 : (36-20)/15 =
(72-7)/21 • 1/4 • 15/16 =
65/21 • 1/4 • 15/16 =
(65•5)/(7•4•16) =
325/448
d)1/2 • 2/3 • 3/4 • 4/5 • ... • 49/50 =
1/50
