812 x 5 + 812 x 7 - 7 - 812 x 2 ???

 toàn câu hỏi sai

=1500

819 x 16 - 819 x 5 - 819

= 819 x 16 - 819 x 5 - 819 x 1

= 819 x ( 16 - 5 - 1 )

= 819 x 10

= 819

189 x 125 - 189 x 25

= 189 x ( 125 - 25 )

= 189 x 100

= 18 900

189x125-189x25

=189x(125-25)

=189x100

=18900

TL 

189 x 125 - 189 x 25

= 189 x (125 - 25)

= 189 x 100

= 18900

\(26\times8+4\times13-10\times26\)
\(=26\times8+2\times2\times13-10\times26\)
\(=26\times8+2\times26-10\times26\)
\(=26\times\left(8+2-10\right)\)
\(=26\times0\)
\(=0\)
#Đang Bận Thở

\(26\times8+4\times13-10\times26\\ =13\times2\times8+4\times13-10\times2\times13\\ =13\times\left(2\times8+4-10\times2\right)\\ =13\times0\\ =0\)

O

     13,25\(\times\)4 + 13,25 \(\times\)5 + 13,25 \(\times\)2 - 13,25

= 13,25 \(\times\)( 4+5+2-1)

= 13,25 \(\times\)10

= 132,5

tym cho mk nhé

\(\dfrac{3}{4}.\dfrac{2}{3}-\dfrac{1}{6}.\dfrac{3}{4}-\dfrac{3}{4}.\dfrac{1}{2}\) 

= \(\dfrac{3}{4}.\left(\dfrac{2}{3}-\dfrac{1}{6}-\dfrac{1}{2}\right)\) 

= \(\dfrac{3}{4}.0\) 

= 0

\(\dfrac{3}{4}\cdot\dfrac{2}{3}-\dfrac{1}{6}\cdot\dfrac{3}{4}-\dfrac{3}{4}\cdot\dfrac{1}{2}\)

\(=\dfrac{3}{4}\left(\dfrac{2}{3}-\dfrac{1}{6}-\dfrac{1}{2}\right)\)

\(=\dfrac{3}{4}\cdot\left(\dfrac{4}{6}-\dfrac{1}{6}-\dfrac{3}{6}\right)\)

=0

75,25 + 75,25 x 362,5 - 263,5 x 75,25

= 75,25 + 75,25 x 362,5 - 263,5 x 75,25 + 1

= 75,25 x ( 362,5 - 263,5 + 1 )

= 75,25 x 100

= 7525