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1994x867+1995x133
=1994x867+1994x133+133
=1994x(867+133)+133
=1994x1000+133
=1994000+133
=1994133
=1994*867+(1994+1)*133
=1994*867+1994*133+133=1994*(867+133)+133
=1994*1000+133=1994000+133
=1994133
\(1994x867+1995x133\)
\(=1994x867+\left(1994+1\right)x133\)
\(=1994x867+1994x133+133\)
\(=1994x\left(867+133\right)+133\)
\(=1994x1000+133\)
\(=1994000+133\)
\(=1994333\)
Chúc bạn học tốt !!!!
a,2009x867+2009x133=2009x(867+133)=2009x1000=2009000
b,có vẻ sai đề.
54 x 133 x 45 x 133 + 133
= ( 54 + 45 + 1 ) x 133
= 100 x 133
= 13300
54 x 133 + 45 x 133 + 133
= 133 x ( 45 + 54 + 1 )
= 133 x 100
= 13300
1994 x 867 + 1995 x 133
= 1994 x 867 + ( 1994 + 1 ) x 133
= 1994 x 867 + 1994 x 133 + 133
= 1994 x ( 867+133) + 133
= 1994 x 1000 + 133
= 1994000+ 133
= 1994133
\(1994\times867+1995\times133\)
\(=1994\times867+1994\times133+133\)
\(=1994\times\left(867+133\right)+133\)
\(=1994\times1000+133\)
\(=1994000+133\)
\(=1994133\)
c ) 815 - 23 - 77 + 185
= ( 815 + 185 ) - ( 23 + 77 )
= 1000 - 100 = 900
m ) 8 x 427 x 3 + 6 x 573 x 4
= 24 x 427 + 24 x 573
= 24 x ( 427 + 573 )
= 24 x 1000
= 24000
g ) 52 - 42 + 37 + 28 - 38 + 63
= ( 52 + 28 ) - ( 42 + 38 ) + ( 37 + 63 )
= 80 - 80 + 100
= 0 + 100
= 100
h ) 35 x 18 - 9 x 70 + 100
= 7 x 5 x 9 x 2 - 9 x 7 x 5 x 2 + 100
= 0 + 100
= 100
n ) 2008 x 867 + 2009 x 133
= 2008 x 867 + ( 2008 + 1 ) x 133
= 2008 x 867 + 2008 x 133 + 133
= 2008 x ( 867 + 133 ) + 133
= 2008 x 1000 + 133
= 2008000 + 133
= 2008133
i ) 326 x 78 + 327 x 22
= 326 x 78 + ( 326 + 1 ) x 22
= 326 x 78 + 326 x 22 + 22
= 326 x ( 78 + 22 ) + 22
= 326 x 100 + 22
= 32600 +22
= 32622
q ) ( 20 + 21 + 22 + 23 + 24 + 25 ) x ( 16 - 2 x 8 )
= ( 20 + 21 + 22 + 23 + 24 + 25 ) x ( 16 - 16)
= ( 20 + 21 + 22 + 23 + 24 + 25 ) x 0
= 0
= 1996 x 1995 - ( 996 + 1000 ) - 1996 x 1994
= 1996 x 1995 - 1996 x 1 - 1996 x 1994
= 1996 x ( 1995 - 1 - 1994 )
= 1996 x 0
= 0
1994x867+1995x133
=1728798+265335
=1994133
nha bạn
aih thi cảm on
a. 3/5 + 6/11 + 7/13 + 2/5 + 16/11 + 19/13
= ( 3/5 + 2/5 ) + ( 6/11 + 16/11 ) + ( 7/13 + 19/13)
= 1 + 2 + 2
= 5.
\(1994\times867+1995\times133=1994\times867+1994\times133+133=1994\times\left(867+133\right)+133\)
\(=1994\times1000+133=1994000+133=1994133\)
1994 x 867 + 1995 x 133
=(1994 x 867) + (1995 x 133)
=1728798 + 265335
=1994133