Rút gọn các phân số sau đến tối giản:
a) \(\frac{2.5.13}{26.35}\)
b) \(\frac{2.\left( -13 \right).9.10}{\left( -3 \right).4.\left( -5 \right).26}\)
c) \(\frac{1978.1979+1980.21+1958}{1980.1979-1978.1979}\)
A.a) \(\frac{1}{7}\) b) \(\frac{-3}{2}\)
c) \(1000\)
B.a) \(\frac{1}{2}\) b) \(\frac{-1}{2}\)
c) \(1000\)
C.a) \(\frac{2}{7}\) b) \(\frac{-1}{2}\)
c) \(1000\)
D.a) \(\frac{12}{7}\) b) \(\frac{-3}{2}\)
c) \(100\)
a) \(\frac{2.5.13}{26.35}\)
b) \(\frac{2.\left( -13 \right).9.10}{\left( -3 \right).4.\left( -5 \right).26}\)
c) \(\frac{1978.1979+1980.21+1958}{1980.1979-1978.1979}\)
A.a) \(\frac{1}{7}\) b) \(\frac{-3}{2}\)
c) \(1000\)
B.a) \(\frac{1}{2}\) b) \(\frac{-1}{2}\)
c) \(1000\)
C.a) \(\frac{2}{7}\) b) \(\frac{-1}{2}\)
c) \(1000\)
D.a) \(\frac{12}{7}\) b) \(\frac{-3}{2}\)
c) \(100\)
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