Question

выполните действия: (3/4+1/20)×1/2; (7/12-1/3)×16/19; плиз помогите на завтра по быстрей

Answer 1

$( frac{3}{4}+ frac{1}{20} ) frac{1}{2} = frac{3*5+1}{20}* frac{1}{2}= frac{16}{40}= frac{4}{10} = 0.4 \ ( frac{7}{12}- frac{1}{3}) frac{16}{19}= frac{7-1*4}{12}* frac{16}{19} = frac{3*16}{12*19}= frac{4}{19}$

Answer 2

(3/4+1/20)*1/2 = (15+1)/20*1/2 = 16/20*1/2 = 8/20 = 2/5
(7/12-1/3)*16/19 = (7-4)/12*16/19 = 3/12*16/19 = 12/57