11*9-900*0.1-9
Tính nhanh : (792.81* 0.25+ 792.81 * 0.75) * (11*9-900*0.1-9)
=792.81*(0.25+0.75)*9*(11+10-1)
=792.81*9*20
co ban nao biet giai bai nay ko
0.*9*50+9*3.2+90*0.28
neu giai duoc minh cho
tính giá trị biểu thức ( 11 x 9 - 900 x 0.1- 8) x ( 56.7 x 0.5 + 56.7 x 9.5)
( 11 x 9 - 900 x 0.1- 8) x ( 56.7 x 0.5 + 56.7 x 9.5)
=(99 - 90 - 8) x [56.7(0.5+9.5)]
=1 x [56.7x10]
=1x 567=567
( 11 x 9 - 900 x 0.1- 8) x ( 56.7 x 0.5 + 56.7 x 9.5)
=(99 - 90 - 8) x [56.7(0.5+9.5)]
=1 x [56.7x10]
=1x 567=567
[1000*0.1-900*0.1-90*0.1]*[142*0.5-240*0.25]
A=((1000-900-90)*0.1)*(142*0.5-240*0.5*0.5)
A=(10*0.1)*((142-120)*0.5)
A=1*22*0.5=11
(1000+0,1-900×0,1-90×0,1)(142×0,5-240×0,25)=1×11=11
(100*0.1-900*0.1-90*0.1)*(142*0.5-240*0.25)=?
( 100 x 0,1 - 900 x 0,1 -90 x 0,1 ) x (142 x 0,5 - 240 x 0,25 )
=(10 - 90 - 9 ) x ( 71 - 60 )
= -89 x 11
= -979
(792,81×0,25+792,81×0,75)×(11×9-900×0,1-9)
(792,81×0,25+792,81×0,75)×(11×9-900×0,1-9)
=(792,81×0,25+792,81×0,75) * 0
=0
792,81 x 0,25 + 792,81 x 0,75 (11 x 9 - 900 x 0,1 - 9)
=792,81x0,25+792,81x0,75
=792,81
(792,81 x 0,25 + 792,81 x 0,75) x (11 x 9 – 900 x 0,1 -9)
b/ ( 729,81 x 0,25 + 729,81 x 0,75 ) x ( 11 x 9 – 900 x 0,1 – 9)
b/ ( 729,81 x 0,25 + 729,81 x 0,75 ) x ( 11 x 9 – 900 x 0,1 – 9)
= ( 729,81 x (0,25 + 0,75) x (99 - 90 - 9)
=( 729,81 x 1) x (99 - (90 + 9)
= 729,91 x (99 - 99)
= 729,91 x 0
=0
Chúc bạn học tốt!
(792,81 x 0,25+792,81 x 0,75) + ( 11 x 9- 900 x 0,1 - 9)
792,81
=[792,81x(0,25 +0,75 )]+(99-90-9)
=[792,81x1]+0=792,81+0=792,81