(3,9-2,55+4 5/12-1 1/15): 4,7(0,81×8 1/3 -0,57:4 3/4): 2,21+4,125 : 2 1/6

Ответ:

0.2

Пошаговое объяснение:

1) 3.9-2.55=1.35=27/20

2) 4 $4\frac{5}{12} - 1\frac{1}{15}=\frac{(4*12+5)*10-(1*15+1)*8}{120} = \frac{201}{60}$

3) $\frac{27}{20}+\frac{201}{60} = \frac{282}{60} =\frac{141}{30}$

4) $\frac{141}{30}/\frac{47}{10} = \frac{141*10}{30*47}=1$

5) $\frac{81}{100}*\frac{25}{3}= \frac{27}{4}$

6) $\frac{57}{100}/\frac{19}{4} =[tex]\frac{27}{4}-\frac{3}{25}=\frac{675-12}{100} =6.63$ /tex]

7) 6.63/2.21=3

8) $4\frac{1}{8} 2\frac{1}{16} =2$

9)3+2=5

10) 1/5=0.2

(3,9-2,55+4 5/12-1 1/15): 4,7(0,81×8 1/3 -0,57:4 3/4): 2,21+4,125 : 2 1/6​