Question

Tính nhanh :

A= 2016.20152015-2015.20162016

Tính :

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

Answer 1

Tính nhanh :

A = \(2016.20152015-2015.20162016\)

= \(2016.2015.10001-2015.2016.1001\)

=0

Answer 2

\(A=2016.20152015-2015.20162016\)

\(=2016.2015.10001-2015.2016.10001\)

\(=0\)

Answer 3

Tính :

\(\dfrac{1993+1993.1994}{1992.1995+1995}\)= \(\dfrac{1993.1+1993.1994}{1992.1995+1995.1}\)=\(\dfrac{1993\left(1+1994\right)}{1995\left(1992+1\right)}\)=\(\dfrac{1993.1995}{1995.1993}=1\)

Answer 4

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

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

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

\(=\dfrac{1993.1995}{1995.1993}=1\)

Answer 5

Tính nhanh :

A = 2016.20152015 − 2015.20162016

= 2016.2015.10001 − 2015.2016.10001

=0