Question

(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​

Answer 1

1)3,9-2,55=1,35

2)4 5/12-1 1/15=53/12-16/15=(53*5-16*4)/60=201/60=3,35

3)1,35+3,35=4,7

4)4,7:4,7=1

5)0,81*8 1/3=(81*25)/100*3=27/4=6,75

6)0,57:4 3/4=0,57:4,75=0,12
7)6,75-0,12=6,63
8)6,63:2,21=3
9)4,125:2 1/16=4,125:2,0625=
=2
10)3+2=5
11)1:5=1/5
ответ: 1/5

Answer 2

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