\(0,1\times x=22,89\\ x=22,89:0,1\\ x=228,9\)

\(x=22,89:0,1\\ x=228,9\)

x = 22,89 :0,1

x = 228,9

31 x 10 = 310    7,02 x 100 = 702
31 x 0,1 = 3,1   7,02 x 0,01 = 0,0702

2/5*3/4/x/5=1/2

x=3

phép tính đâu

=2,450 nha bạn 

HT

Mik cảm ơn bn Nguyễn Thị Phương Anh nha

2,45 x 0,3 + 2,45 x 0,6 + 2,45 x 0,1

= 2,45 x ( 0,3 + 0,6 + 0,1 )

= 2,45 x 1

= 2,45

Ta có:

\(\frac{1}{x-1}-\frac{2x}{x^3-x^2+x-1}\)

\(=\frac{1}{x-1}-\frac{2x}{x^2\left(x-1\right)+\left(x-1\right)}\)

\(=\frac{x^2+1}{\left(x-1\right)\left(x^2+1\right)}-\frac{2x}{\left(x^2+1\right)\left(x-1\right)}\)

\(=\frac{x^2+1-2x}{\left(x-1\right)\left(x^2+1\right)}\)

\(=\frac{\left(x-1\right)^2}{\left(x-1\right)\left(x^2+1\right)}=\frac{x-1}{x^2+1}\)

0,01*10

Phép tính :  0,1 = ? x ?

Trl :
0,1 = 0,01 x 10

Hok tốt ~_~

a,27,3x4,6+96,4x27,3-27,3=27,3x(4,6+96,4-1)=27,3x100=2730

b,87,4x12,74+74,52x43,7=43,7x2x12,74+74,52x43,7=43,7x25,48+74,52x43,7=43,7x(25,48+74,52)=43,7x100 =4370

c,0,1+0,3+0,5+...................+3,7+3,9=(0,1+3,9)+(0,3+3,7)+................(1,9+2,1)=4+4+.............+4(10 số 4)=4x10=40

                                                              Tick nha