Помогите пожалуйста!!прошу!

1)
$3,6* \frac{2}{9}= 3\frac{6}{10}* \frac{2}{9}=3 \frac{3*2}{5*2}* \frac{2}{9}= 3\frac{3}{5}* \frac{2}{9}= \frac{3+3*5}{5}* \frac{2}{9}= \frac{18}{5}* \frac{2}{9}= \frac{18*2}{5*9}=$ $\frac{36}{45}= \frac{4*9}{5*9}= \frac{4}{5}=0,8$

2)
$7 \frac{1}{5}-3,059= 7\frac{1}{5}- 3\frac{59}{1000}= \frac{7*5+1}{5}- \frac{3*1000+59}{1000}= \frac{36}{5}- \frac{3059}{1000}=$ $\frac{36*1000}{5*1000}- \frac{3059*5}{1000*5}= \frac{36000}{5000}- \frac{15295}{5000}= \frac{36000-15295}{5000}= \frac{20705}{5000}= \frac{4141*5}{1000*5}= \frac{4141}{1000}$ $=\frac{141+4*1000}{1000}=4 \frac{141}{1000}=4,141$

3)
$\frac{1}{8}:12,5= \frac{1}{8}: 12\frac{5}{10}= \frac{1}{8}: \frac{12*10+5}{10}= \frac{1}{8}: \frac{125}{10}= \frac{1}{8}* \frac{10}{125}= \frac{1*10}{8*125}= \frac{10}{1000} =$ $\frac{1*10}{100*10}= \frac{1}{100}=0,01$

4)
$2 \frac{3}{11}*0,22= 2\frac{3}{11}* \frac{22}{100}= \frac{2*11+3}{11}* \frac{22}{100}= \frac{25}{11}* \frac{22}{100}= \frac{25*22}{11*100}= \frac{550}{1100}=$ $\frac{1*550}{2*550}= \frac{1}{2}=0,5$