=1×11=11☺☺

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

1/90:0.25+1/90:0.5+1/90:0.125-1/90:0.1

= 1/90 x 4 + 1/90 x 5 + 1/90 x 2 + 1/90 x 8 - 1/90 x 10

= 1/90 x ( 4+5+2+8-10)

= 1/90 x 9

= 1/10

k nha!Cảm ơn nhiều!

chúc học tốt nhé

x = 13,6

44.9

=44,9

44.9

=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

1/2 : 0.5 - 1/4 : 0.25 + 1/8 : 0.125 - 1/10 : 0. 1

= 1 - 1  +  1 - 1

= 0 + 0

= 0

\(\frac{1}{2}:0,5-\frac{1}{4}:0,25+\frac{1}{8}:0,125-\frac{1}{10}:0,1\)

\(=\frac{1}{2}:\frac{1}{2}-\frac{1}{4}:\frac{1}{4}+\frac{1}{8}:\frac{1}{8}-\frac{1}{10}:\frac{1}{10}\)

\(=1-1+1-1=0\)

bằng 0

1/2:0,5-1/4:0,25+1/8:0,125-1/10:0,1

=1-1+1-1

=0