a) \(\dfrac{1997x1996-1}{1995x1997+1996}=\dfrac{1997x\left(1995+1\right)-1}{1995x1997+1996}\)

\(=\dfrac{1997x1995+1997-1}{1995x1997+1996}=\dfrac{1997x1995+1996}{1995x1997+1996}=1\)

b) \(\dfrac{1997x1996-995}{1995x1997+1002}=\dfrac{1997x\left(1995+1\right)-995}{1995x1997+1002}\)

\(=\dfrac{1997x1995+1997-995}{1995x1997+1002}=\dfrac{1997x1995+1002}{1995x1997+1002}=1\)

1995 x 1996 - 1997 / 1995 x 1994 +1993 = 3982017,001

3982017,001 nhé bạn >.<

day la bai tinh nhanh ma ban

1995.(1997-1996)

1995.(1994-1993)   = 1 nhé

\(...=\dfrac{1998x1996+1996+1+1996-1}{\left(1997-1995\right)x1996}\)

\(=\dfrac{1998x1996+2x1996}{2x1996}=\dfrac{1996\left(1998+2\right)}{2x1996}=\dfrac{2000}{2}=1000\)

KQ = 995 nha

995

\(1997\times1996+1\)

\(=3986012+1\)

\(=3986013\)

\(1995\times1997+1996\)

\(=3984015+1996\)

\(=3986011\)

học tốt

1997x1996+1=3986013
1995x1997+1996=3986011
calculator tính r, ko sai đâu:)

1997×1996+1

3986012+1

3986013

1995×1997+1996

3984015+1996

3986011

\(\frac{1995.1997-1}{1996.1995+1994}\)

\(=\frac{1995.1996+1995-1}{1996.1995+1994}\)

\(=\frac{1995.1996+1994}{1996.1995+1994}=1\)

#

-\(\frac{1995\cdot1997-1}{1995\cdot1996+1994}\)

=\(\frac{1995\cdot\left(1996+1\right)-1}{1995\cdot1996+1994}\)

=\(\frac{1995\cdot1996+1995\cdot1-1}{1995\cdot1996+1994}\)

=\(\frac{1995\cdot1996+1994}{1995\cdot1996+1994}\)

=1

Bạn cần làm gì với M?

a) \(\frac{399\times45+55\times399}{1995\times1996-1991\times1995}=\frac{399\times\left(45+55\right)}{1995\times\left(1996-1991\right)}=\frac{399\times100}{1995\times5}=4\)

b) \(\frac{1996\times1995-996}{1000+1996\times1994}=\frac{1996\times\left(1994+1\right)-996}{1000+1996\times1994}=\frac{1996\times1994+1996-996}{1000+1996\times1994}\)

\(=\frac{1996\times1994+1000}{1000+1996\times1994}=1\)

c) \(\frac{637\times527-189}{526\times637+448}=\frac{637\times\left(526+1\right)-189}{526\times637+448}=\frac{637\times526+637-189}{526\times637+448}=\frac{637\times526+448}{526\times637+448}=1\)

d) \(\frac{677\times874+251}{678\times874-623}=\frac{677\times874+251}{874\times\left(677+1\right)-623}=\frac{677\times874+251}{874\times677+874-623}=\frac{677\times874+251}{874\times677+251}=1\)

3982017.001

= 3982017,00 10000000%

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