[2012x0,25+2012x0,75]x[11x9-900x0,1-9]
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\(\left(792,81\cdot0,25+792,81\cdot0,75\right)\cdot\left(11\cdot9-900\cdot0,1-9\right)\)
\(=792,81\cdot\left(0,25+0,75\right)\cdot\left(11\cdot9-9\cdot10-9\right)\)
\(=792,81\cdot1\cdot9\cdot\left(11-10-1\right)\)
\(=792,81\cdot9\cdot0\\ =0\)
(3721 x 1,3 + 3570 : 35) x (11 x 9 - 900 x 0,1 - 9)
= (3721 x 1,3 + 3570 : 35) x ( 99 - 90 - 9)
= ( 3721 x 1,3 + 3570 : 35) x 0
= 0
(3721X1,3+3570:35)X(11X9-900X0,1-9)=(4837,3+102)X(99-90-9)
=> Vế trước nhân 0 vậy kết quả bằng 0
\(\left(123\text{ ×}0,25+123\text{ ×}0,75\right)\text{ ×}\left(11\text{ ×}9-900\text{ ×}0,1-9\right)\)
\(=\left(123\text{×}0,25+123\text{×}0,75\right)\text{ ×}\left(11\text{×}9-9\text{×}100\text{×}0,1-9\text{×}1\right)\)
\(=\left(123\text{×}0,25+123\text{×}0,75\right)\text{ ×}\left(11\text{×}9-9\text{×}10-9\text{×}1\right)\)
\(=\left[123\left(0,25+0,75\right)\right]\text{×}\left[9\text{×}\left(11-10-1\right)\right]\)
\(=\left(123\text{×}1\right)\text{×}\left(9\text{×}0\right)=123\text{×}0=0\)
(792,81x0,25+792,81x0,75)x(11x9-900x0,1-9)
=792,81x(0,25+0,75)x(999-81)
=792,81x100x918
=79281x918
=72779958
tk minh nha
Giải
a) ( 792,81.0,25 + 792,81.0,75 ).( 11.9 - 900.0,1 - 9 )
= ( 792,81.0,25 + 792,81.0,75 ).9.(11 - 100.0,1 - 1 )
= ( 792,81.0,25 + 792,81.0,75 ).9.0
= 0
b) 3,54.73 + 0,23.25 + 3,54.27 + 0,17.25
= ( 3,54.73 + 3,54.27 ) + ( 0,23.25 + 0,17.25 )
= 3,54.( 73 + 27 ) + 25.( 0,23 + 0,17 )
= 3,54.100 + 25.0,4
= 354 + 10
= 364
[792,81 x (0,25 + 0,75)] x (11,9 - 90-9)
=792,81 x -87,1
=-69053,751
(20,1 . 20,2 + 28,3 . 12,4) . (11 . 9 - 900 . 0,1 - 9)
= ( 20,1 . 20,2 + 28,3 . 12,4) . 0
= 0
\(=\left(2012x\frac{1}{4}+2012x\frac{3}{4}\right)x\left(11x9-90-9\right)\)
\(=2012x\left(\frac{1}{4}+\frac{3}{4}\right)x\left(11x9-10x9-9x1\right)\)
\(=2012x9x\left(11-10-1\right)\)
=\(2012x9x0\)
=0
Chúc bn học giỏi, k cho mình nhé!!!
= (2012 x 0,25 + 2012 x 0,75) x (99 - 90 - 9 )
= (2012 x 0,25 + 2012 x 0,75) x ( 9 - 9)
=(2012 x 0,25 + 2012 x 0,75) x 0
= 0