\(\dfrac{1993+1993.1994}{1992.1995+1995}\)

=\(\dfrac{1993.1+1993.1994}{1992.1995+1995.1}\)

=\(\dfrac{1993\left(1+1994\right)}{1995\left(1992+1\right)}\)

=\(\dfrac{1993.1995}{1995.1993}\)

=1

\(=\dfrac{1993.1+1993.1994}{1992.1995+1995.1}\)

\(=\dfrac{1993\left(1+1994\right)}{1995\left(1992+1\right)}\)

\(=\dfrac{1993.1995}{1995.1993}\)

=1

\(\dfrac{1993+1993\cdot1994}{1992\cdot1995+1995}\\ =\dfrac{1993\cdot1+1993\cdot1994}{1992\cdot1995+1995\cdot1}\\ =\dfrac{1993\left(1+1994\right)}{1995\left(1992+1\right)}\\ =\dfrac{1993\cdot1995}{1995\cdot1993}\\ =1\)

\(2015.20162016-2016.20152015=2015.2016.10001-2016.2015.10001=0\)

A= \(\dfrac{1993\left(1994+1\right)}{1995\left(1992+1\right)}\)=1

B=\(\dfrac{399\left(45+55\right)}{1995\left(1996-1991\right)}\)=\(\dfrac{399.5.100}{399.5.5}\)=100

C=\(\dfrac{1996.1994+1996-996}{1000+1996.1994}\)=1

\(A=2016.20152015-2015.20162016\)

\(=2016.2015.10001-2015.2016.1001\)

\(=0\)

\(A=2016.20152015-2015.20162016\)

\(=2016.2015.10001-2015.2016.10001\)

\(=0\)

\(A=2016\cdot20152015-2015\cdot20162016\)

\(A=2016\cdot2015\cdot10001-2015\cdot2016\cdot10001\)

\(A=0\)

A>B like nha

Lan Yêu Nghi THôn 1

Lan Đơ

2016 x 20152015 – 2015 x 20162016

= 2016 x 2015 x 10001 – 2015 x 2016 x 10001

= 0

2016.20152015-2015.20162016

= ( 2016 - 2015 ) x ( 20162016 - 20152015)

= 1 x 1001

= 1001

Mình đoán thôi, sai thì đừng giận nha 

Hãy đặt lại biểu thức:

\(\dfrac{1995}{1997}x\dfrac{1997}{54}x\dfrac{27}{45}x\dfrac{90}{1993}x\dfrac{1993}{1995}\)

= \(\dfrac{1}{1}x\dfrac{1}{2}x\dfrac{1}{1}x\dfrac{2}{1}x\dfrac{1}{1}=\dfrac{2}{2}=1\) (Thực hiện gạch)