1995×1994-1
-------------------------
1993×1995+1994
A=1995 x 1994 - 1/1993 x 1995 + 1994
\(A=\dfrac{1995\times1994-1}{1993\times1995+1994}\)
\(A=\dfrac{1995\times\left(1993+1\right)-1}{1993\times1995+1994}\)
\(A=\dfrac{1995\times1993+1995-1}{1995\times1993+1994}\)
\(A=\dfrac{1995\times1993+1994}{1995\times1993+1994}\)
\(A=1\)
(1995 × 1994 - 1)/(1993 × 1995 + 1994)
= 3978029/3978029
= 1
Tính nhanh:
1995 x 1994 - 1/1993 x 1995 + 1994
=1995*1994-1/(1994-1)*1995+1994
=1995*1994-1/1994*1995-1995+1994
=1995*1994-1/1994*1995-1
=1
1995×1994-1
-----------------------
1993×1995+1994
\(\dfrac{1995.1994-1}{1993.1995+1994}=\dfrac{1995.1994-1}{1993.1995+1994}=\dfrac{1993.1995+1995-1}{1993.1995+1994}=1\)
Tính nhanh giá trị biểu thức:
1995 x 1994 -1 / 1993 x 1995 + 1994
1995 * 1994 - 1 / 1993 * 1995 + 1994
= 1995 * 1994 - 1 / ( 1994 -1 ) * 1995 + 1994
= 1995 * 1994 - 1 / 1994 * 1995 - 1995 + 1994
= 1995 * 1994 - 1 / 1994 * 1995 - 1
= 1
Tính nhanh giá trị biểu thức :
1995 x 1994 - 1 / 1993 x 1995 + 1994
= 1995 x 1994 - 1 / ( 1994 - 1 ) x 1995 + 1994
= 1995 x 1994 - 1 / 1994 x 1995 - 1995 + 1994
= 1995 x 1884 - 1 / 1994 x 1995 - 1
= 1
1995/1997 * 1990/1993 * 1997/1994 * 1993/1995 *997/995
1995/1997 nhân 1990/1993 nhân 1997/1994 nhân 1993/1995 nhân 997/995
bằng 1
1995 x 1996 - 1997 / 1995 x 1994 +1993
1995 x 1996 - 1997 / 1995 x 1994 +1993 = 3982017,001
tính nhanh : 1995 x 1993 - 18 / 1975 + 1993 x 1994
1996 x 1995 - 996 / 1000 + 1996 x 1994
Ta có \(\frac{1995x1993-18}{1975+1993x1994}\)
=\(\frac{1993x1994+1993-18}{1975+1993x1994}\)
=\(\frac{1975+1993x1994}{1975+1993x1994}\)
=\(1\)
b)Ta có \(\frac{1996x1995-996}{1000+1996x1994}\)
=\(\frac{1996x1994+1996-996}{1000+1996x1994}\)
=\(\frac{1000+1996x1994}{1000+1996x1994}\)
=\(1\)
A = 1995*1993-18/ 1975+1993*1994
A = 1995 x 1993 - 18 / 1975 + 1993 x 1994
= (1994 + 1) x 1993 - 18 / 1975 + 1993 x 1994
= 1994 x 1993 + 1993 - 18 / 1975 + 1993 x 1994
= 1994 x 1993 + 1975 / 1975 + 1993 x 1994
= 1
A = 1995 x 1993 - 18 / 1975 + 1993 x 1994= (1994 + 1) x 1993 - 18 / 1975 + 1993 x 1994= 1994 x 1993 + 1993 - 18 / 1975 + 1993 x 1994= 1994 x 1993 + 1975 / 1975 + 1993 x 1994= 1
A = 1995 x 1993 - 18/1975 + 1993 x 1994
= ( 1994 + 1 ) x 1993 - 18/1975 + 1993 x 1994
= 1994 x 1993 + 1993 - 18/1975 + 1993 x 1994
= 1994 x 1993 + 1975/1975 + 1993 x 1994
= 1