Упр.671 Часть 2 ГДЗ Виленкин Жохов 6 класс (Математика)

Задача

а) 0,38 * 2/19;
б) 3,16 : 4/7;
в) 3/8 — 0,48;
г) 0,169 : 13/14;
д) 13,13 : 1 2/11;
е) 232,3 : 33 2/3.

Подробный ответ

а) $$0{,}38 \cdot \frac{2}{19} = \frac{38}{100} \cdot \frac{2}{19} = \frac{2}{100} \cdot \frac{2}{1} = \frac{4}{100} = 0{,}04.$$

б) $$3{,}16 : \frac{4}{7} = \frac{316}{100} \cdot \frac{7}{4} = \frac{79}{25} \cdot \frac{7}{4} = \frac{553}{100} = 5{,}53.$$

в) $$\frac{3}{8} — 0{,}48 = 0{,}375 — 0{,}48 = -0{,}105.$$

г) $$0{,}169 : \frac{13}{14} = \frac{169}{1000} \cdot \frac{14}{13} = \frac{13}{1000} \cdot \frac{14}{1} = \frac{182}{1000} = 0{,}182.$$

д) $$13{,}13 : 1\frac{2}{11} = \frac{1313}{100} : \frac{13}{11} = \frac{1313}{100} \cdot \frac{11}{13} = \frac{101}{100} \cdot 11 = \frac{1111}{100} = 11{,}11.$$

е) $$232{,}3 : 33\frac{2}{3} = \frac{2323}{10} : \frac{101}{3} = \frac{2323}{10} \cdot \frac{3}{101} = \frac{23}{10} \cdot 3 = \frac{69}{10} = 6{,}9.$$