20/11x33/23x69/180

=(20/11x69/180)x33/23

=23/33 x 33/23

=1

\(\frac{20}{11}\times\frac{33}{23}\times\frac{69}{180}\)

 = \(\frac{20}{11}\times\frac{33}{23}\times\frac{69}{180}=\frac{20\times33\times69}{11\times23\times180}\)\(=\frac{1\times3\times3}{1\times1\times9}=\frac{9}{9}=1\)

k mk nha Nguyễn Lê Tiểu Long

20*33*69=20*11*3*23*3=3*3=9

11*23*180=11*23*20*9=9=9

=1

Sửa đề: \(\frac{20}{33}\times\frac{23}{69}\times\frac{69}{180}\)

Ta có: \(\frac{20}{33}\times\frac{23}{69}\times\frac{69}{180}\)

\(=\frac{20}{180}\times\frac{23}{33}\times\frac{69}{69}\)

\(=\frac19\times\frac{23}{33}=\frac{23}{297}\)

a) \(\frac{20}{11}\times\frac{33}{23}\times\frac{69}{180}=1\)

b) =16,7598

( 12+21+33) x 11= 704

TL:

\(\text{12 x 11 + 21 x 11+11 x 33}\)
\(\text{= (12 + 21 + 33) x 11 = 66 x 11 = 726}\)

x+x+14=180

Gộp lại thành:

2x+14=180

k anh nha

x+x+14=180

   2x+14=180

       2x=180-14

         2x= 166

           x=166:2

           x=83

Cho mk nhe ban !!!!!

20/11*33/23*69/180=1/1*3/1*3/9=1 

\(\frac{20}{11}\cdot\frac{33}{23}\cdot\frac{69}{180}=\frac{20\cdot33\cdot69}{11\cdot23\cdot180}=\frac{9}{9}=1\)

20/11*33/23*69/180=20/11*33/23*23/60