Question

[Tran Thuy Linh]

tính hợp lí : 

a) 2004 . 2004 -2003 . 2005

b) \(\frac{3}{4}.\frac{2}{5}-\frac{3}{10}.\frac{4}{3}\)

c) \(3\frac{1}{11}.\frac{27}{46}.1\frac{6}{7}.2\frac{4}{9}\)