336. Найдите произведение: 1) 6/11 · 4/7; 2) 7/20 · 10/21; 3) 8/9 · 27/32; 4) 23/28 · 49/46; 5) 34/86 · 43/51; 6) 7/18 · 90/77; 7) 63/64 · 48/91; 8) 19/100 · 5/38.

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Accepted Answer

\(\frac{6}{11}\cdot\frac{4}{7}=\frac{24}{77}\).
\(\frac{7}{20}\cdot\frac{10}{21}=\frac{1}{6}\).
\(\frac{8}{9}\cdot\frac{27}{32}=\frac{3}{4}\).
\(\frac{23}{28}\cdot\frac{49}{46}=\frac{7}{8}\).
\(\frac{34}{86}\cdot\frac{43}{51}=\frac{1}{3}\).
\(\frac{7}{18}\cdot\frac{90}{77}=\frac{5}{11}\).
\(\frac{63}{64}\cdot\frac{48}{91}=\frac{9}{?}\) Проверим сокращение: \(63/91=9/13\), \(48/64=3/4\), поэтому \(\frac{9}{13}\cdot\frac{3}{4}=\frac{27}{52}\).
\(\frac{19}{100}\cdot\frac{5}{38}=\frac{1}{40}\).

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