rút gọn phân số:
\(\frac{-1997.1996+1}{\left(-1995\right).\left(-1997\right)+1996}\)
rút gọn phân số:
b) \(\frac{-1997.1996+1}{\left(-1995\right).\left(-1997\right)+1996}\)
A=\(\frac{-1997.1996+1}{\left(-1995\right).\left(-1997\right)+1996}\)
Rút gọn A
Rút gọn
\(\frac{-1997.1996+1}{-1995.\left(-1997\right)+1996}\)
\(\frac{-1997.1996+1}{-1995.\left(-1997\right)+1996}=\frac{-1997.\left(1995+1\right)+1}{1995.1997+1996}\)
\(=\frac{-1997.1995-1997+1}{1995.1997+1996}\)
\(=\frac{-1997.1995-1996}{1995.1997+1996}\)
\(=\frac{-\left(1997.1995+1996\right)}{1995.1997+1996}\)
\(=-1\)
rút gọn các phân số sau
a) :\(\frac{\left(-5\right)^3.40.4^3}{135.\left(-2\right)^{14}.\left(-100\right)^0}\)
b) \(\frac{-1997.1996+1}{\left(-1995\right).\left(-1997\right)+1996}\)
rút gọn phân số:
\(a.\dfrac{-315}{540}\)
\(b.\dfrac{25.13}{26.35}\)
\(c.\dfrac{3.13-13.18}{15.40-80}\)
\(d.\dfrac{-1997.1996+1}{\text{(}-1995\text{)}.\left(-1997\right)+1996}\)
1,Rút gọn phân số
\(\frac{-1997.1996+1}{\left(-1995\right).\left(-1997\right)+1996}\)
\(\dfrac{-1997\cdot1996+1}{\left(-1995\right)\left(-1997\right)+1996}\)
\(=\dfrac{-1997\cdot1996+1}{1995\cdot1997+1997-1}\\ =\dfrac{-1997\cdot1996+1}{1996\cdot1997-1}\)
\(=\dfrac{-\left(1997\cdot1996-1\right)}{1997\cdot1996-1}\\ =-1\)
1,Rút gọn
\(\frac{-1997.1996+1}{\left(-1995\right).\left(-1997\right)+1996}\)
\(\frac{-1997.1996+1}{\left(-1995\right).\left(-1997\right)+1996}=\frac{-1997\left(1995+1\right)+1}{1995.1997+1996}\)
\(=\frac{-1997.1995+\left(-1997\right)+1}{1995.1997+1996}=\frac{-1997.1995+\left(-1996\right)}{1995.1997+1996}=-1\)
\(\dfrac{\left(-1997\right).1996+1}{\left(-1995\right).\left(-1997\right)+1996}=\dfrac{-1997\left(1995+1\right)+1}{1995.1997+1996}=\dfrac{-1997.1995+\left(-1997\right)+1}{1995.1997+1996}=\dfrac{-1997.1995+\left(-1996\right)}{1995.1997+1996}=-1\)
Rút gọn phân số
\(y=\frac{\left(-5\right)^3.40.4^3}{135.\left(-2\right)^{14}.1}\) ; \(\frac{2929-101}{2.1919+404}\) ; \(\frac{-1997.1996+1}{-1995.\left(-1997\right)+1996}\)
rút gọn các phân số sau
\(\frac{3.5.7.11.13.37-10101}{1212120+40404}\)
\(\frac{4^2.5.11}{44.20}\)
\(\frac{\left(-13\right).15.6}{18.65.\left(-7\right)}\)
\(\frac{7.2.8.5^2}{14.2.5}\)
\(\frac{-1997.1996+1}{\left(-1995\right).\left(-1997\right)+1996}\)
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