Question

Номер 313 пожалуйста, напишите на бумажке

Answer 1

$frac{(3.9 - 2.55 + 4 frac{5}{12} - 1 frac{1}{15}) div 4.7 }{ (0.81 times 8 frac{1}{3} - 0.57 div 4 frac{3}{4}) div 2.21 + 4.125 div 2 frac{1}{16} } = frac{1}{5} = 0.2\ 1) : 3.9 - 2.55 = 1.35 = 1 frac{7}{20} \ 2) : 1 frac{7}{20} + 4 frac{5}{12} - 1 frac{1}{15} = 1 frac{21}{60} + 4 frac{25}{60} - 1 frac{4}{60} = 4 frac{21 + 25 - 4}{60} = 4 frac{42}{60} = 4 frac{7}{10} = 4.7 \ 3) : 4.7 div 4.7 = 1$
$4)0.81 times 8 frac{1}{3} = frac{81}{100} times frac{25}{3} = frac{27}{4} = 6 frac{3}{4} = 6.75 \ 5) : 0.57 div 4 frac{3}{4} = frac{57}{100} div frac{19}{4} = frac{57 times 4}{100 times 19} = frac{3}{25} = 0.12 \ 6) : 6.75 - 0.12 = 6.63 \ 7) : 6.63 div 2.21 = 3$
$8) : 4.125 div 2 frac{1}{16} = 4 frac{1}{8} div frac{33}{16} = frac{33}{8} times frac{16}{33} = 2 \ 9) : 3 + 2 = 5 \ 10) : frac{1}{5} = 0.2$