Question

Как решить ?
(дроби)
(1/15 + 1/10 +12 .2/15 ): 1/15 = ?
(2/5 - 3/10 + 1/20) : 1 .2/3 - 3/4 =?
(1 - 2/3) : 2/3 +(4/5 -1) x 5 =?
(7/8 - 1/2 ): 3/4 -5 : (1/3 -1/8 ) =? 

Answer 1

$( frac{2}{5} - frac{3}{10} + frac{1}{20} ): frac{1.2}{3} - frac{3}{4} =$             $1) frac{2}{5} - frac{3}{10} = frac{4-3}{10}= frac{1}{10} , 2) frac{1}{10} + frac{1}{20} = frac{2+1}{20} = frac{3}{20} 3) 1,2/3=0,4= frac{4}{10} = frac{2}{5} 4) frac{3}{20} : 0,4= frac{3}{20} : frac{2}{5} = frac{3}{20} * frac{5}{2} = frac{3*1}{4*2} = frac{3}{8} 5) frac{3}{8} - frac{3}{4} = frac{3-6}{8} = frac{-3}{8}$

Answer 2

(1 - 2/3) : 2/3 +(4/5 -1) x 5=

Answer 3

1) 7/8-1/2=7-4/8=3/8, 2) 3/8:3/4= 3/8*4/3=1/2, 3)1/3-1/8=8-3/24=5/24, 4)5:5/24=5/1:5/24=5/1*24/5=24/1=24, 5)1/2-24=1/2-24/1=1-48/2=-47/2=-23 1/2