Вычислите: 1) $\frac{4}{5}\cdot18$; 2) $\frac{8}{9}\cdot81$; 3) $\frac{4}{7}\cdot16$; 4) $\frac{5}{16}:25$; 5) $6:\frac{12}{17}$; 6) $4:\frac{16}{41}$; 7) $\frac{4}{11}:4$; 8) $\frac{15}{36}:3$; 9) $12:4\frac{4}{5}$; 10) $5\frac{3}{7}:\frac{5}{7}$; 11) $2\frac{4}{11}\cdot1\frac{5}{6}$; 12) $1\frac{3}{8}\cdot\frac{4}{11}$; 13) $3\frac{9}{16}\cdot4$.

Question

Вопрос: $Фото задания: Вычислите: 1) $\frac{4}{5}\cdot18$; 2) $\frac{8}{9}\cdot81$; 3) $\frac{4}{7}\cdot16$; 4) $\frac{5}{16}:25$; 5)…$ Фото задания

Accepted Answer

$\frac{4}{5}\cdot18=\frac{4\cdot18}{5}=\frac{72}{5}=14\frac{2}{5}$.
$\frac{8}{9}\cdot81=8\cdot9=72$.
$\frac{4}{7}\cdot16=\frac{64}{7}=9\frac{1}{7}$.
$\frac{5}{16}:25=\frac{5}{16}\cdot\frac{1}{25}=\frac{1}{80}$.
$6:\frac{12}{17}=6\cdot\frac{17}{12}=\frac{17}{2}=8\frac{1}{2}$.
$4:\frac{16}{41}=4\cdot\frac{41}{16}=\frac{41}{4}=10\frac{1}{4}$.
$\frac{4}{11}:4=\frac{4}{11}\cdot\frac{1}{4}=\frac{1}{11}$.
$\frac{15}{36}:3=\frac{15}{36}\cdot\frac{1}{3}=\frac{5}{36}$.
$12:4\frac{4}{5}=12:\frac{24}{5}=12\cdot\frac{5}{24}=\frac{5}{2}=2\frac{1}{2}$.
$5\frac{3}{7}:\frac{5}{7}=\frac{38}{7}\cdot\frac{7}{5}=\frac{38}{5}=7\frac{3}{5}$.
$2\frac{4}{11}\cdot1\frac{5}{6}=\frac{26}{11}\cdot\frac{11}{6}=\frac{13}{3}=4\frac{1}{3}$.
$1\frac{3}{8}\cdot\frac{4}{11}=\frac{11}{8}\cdot\frac{4}{11}=\frac{1}{2}$.
$3\frac{9}{16}\cdot4=\frac{57}{16}\cdot4=\frac{57}{4}=14\frac{1}{4}$.

Ответ: