Question

вычислите 1) 1/4/5 2) 1/1/2

Answer 1

$frac{1}{frac{4}{5}} =frac{5}{4} ; ,; ; frac{1}{frac{1}{2}} =2; ,; ; frac{frac{1}{4}}{5} = frac{1}{20}$

Answer 2

1:4:5=
1 1 1 1
1).- × - × - = -
1 4 5 20

2). 1:1:2=
1 1 1 1
- × - × - = -
1 1 2 2