Tính nhanha) \(\frac{37}{53}.\frac{23}{48}.\frac{...

Câu hỏi:  Tính nhanha) \(\frac{37}{53}.\frac{23}{48}.\frac{535353}{373737}.\frac{242424}{232323}\)b) \(\frac{2003.1999-2003.999}{2004.999+1004}\)

A a) \(\frac{5}{2}\)

b) \(3\)

B a) \(\frac{1}{2}\)

b) \(2\)

C a) \(\frac{1}{2}\)

b) \(1\)

D a) \(\frac{3}{2}\)

b) \(1\)