Question

30 баллов


(3/5 - 1 2/3):16

1/23*(5/6 + 4/9)

(1/11 + 1/3)*3/7


5:(-1,25)+2,8*1/7+1/3

9,8 : (10-3 7/15)*1 1/27

Answer 1

$( frac{3}{5} - 1 frac{2}{3} ) div 16 = - frac{1}{15} \ frac{3}{5} - 1 frac{2}{3} = frac{9}{15} - 1 frac{10}{15} = - 1 frac{1}{15}$
$- 1 frac{1}{15} div 16 = - frac{16}{15} times frac{1}{16} = - frac{1}{15}$
$frac{1}{23} times ( frac{5}{6} + frac{4}{9} ) = frac{1}{18} \ frac{5}{6} + frac{4}{9} = frac{15}{18} + frac{8}{18} = frac{23}{18}$
$frac{1}{23} times frac{23}{18} = frac{1}{18}$
$( frac{1}{11} + frac{1}{3} ) times frac{3}{7} = frac{2}{11} \ frac{1}{11} + frac{1}{3} = frac{3}{33} + frac{11}{33} = frac{14}{33}$
$frac{14}{33} times frac{3}{7} = frac{2}{11}$
$5 div ( - 1.25) + 2 frac{4}{5} times frac{1}{7} + frac{1}{3} = \ 5 div ( - 1.25) = - 500 div 125 = - 4$
$2 frac{4}{5} times frac{1}{7} = frac{14}{5} times frac{1}{7} = frac{2}{5} = 0.4$
$- 4 + 0.4 = - 3.6 + frac{1}{3} = \ - 3 frac{3}{5} + frac{1}{3} = - 3 frac{9}{15} + frac{5}{15} = - 3 frac{4}{15}$