Вычислите: 1) $\frac47 a : \frac{16}{23}$, $a=7$; 2) $\frac35 a : \frac67$, $a=5$; 3) $\frac49 a : \frac1{11}$, $a=11$; 4) $\frac{11}{15}a : \frac{10}{11}$, $a=2$; 5) $\frac{15}{17}a : \frac7{17}$, $a=1$; 6) $\frac3{13}a : \frac5{13}$, $a=4$; 7) $\frac59\cdot\frac7{10}a$, $a=3$; 8) $\frac13a : \frac49$, $a=5$; 9) $\frac8{17}a\cdot\frac{51}{16}$, $a=2$; 10) $\frac{51}{50}a : \frac{17}{100}$, $a=10$; 11) $\frac7{11}\cdot\frac{121}{126}a$, $a=5$; 12) $\frac5{12}a\cdot\frac35$, $a=4$.

Question

$Фото задания: Вычислите: 1) $\frac47 a : \frac{16}{23}$, $a=7$; 2) $\frac35 a : \frac67$, $a=5$; 3) $\frac49 a : \frac1{11}$,…$ Фото задания

Accepted Answer

$\frac47\cdot7:\frac{16}{23}=4\cdot\frac{23}{16}=\frac{23}{4}$.
$\frac35\cdot5:\frac67=3\cdot\frac76=\frac72$.
$\frac49\cdot11:\frac1{11}=\frac{44}{9}\cdot11=\frac{484}{9}$.
$\frac{11}{15}\cdot2:\frac{10}{11}=\frac{22}{15}\cdot\frac{11}{10}=\frac{121}{75}$.
$\frac{15}{17}:\frac7{17}=\frac{15}{7}$.
$\frac3{13}\cdot4:\frac5{13}=\frac{12}{13}\cdot\frac{13}{5}=\frac{12}{5}$.
$\frac59\cdot\frac7{10}\cdot3=\frac{7}{6}$.
$\frac13\cdot5:\frac49=\frac53\cdot\frac94=\frac{15}{4}$.
$\frac8{17}\cdot2\cdot\frac{51}{16}=3$.
$\frac{51}{50}\cdot10:\frac{17}{100}=\frac{51}{5}\cdot\frac{100}{17}=60$.
$\frac7{11}\cdot\frac{121}{126}\cdot5=\frac{11}{18}\cdot5=\frac{55}{18}$.
$\frac5{12}\cdot4\cdot\frac35=1$.

Ответ: