1. Выполни действия: 1) 3/8 + 5/12; 2) 7/10 − 1/4; 3) 2 1/3 + 1 5/6; 4) 6 5/12 − 2 7/18; 5) 14/15 · 25/28; 6) 3 3/4 : 1 1/2; 7) 6 − 2 3/5; 8) 11 − 3 5/22.

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Вопрос:

Accepted Answer

\(\frac{3}{8}+\frac{5}{12}=\frac{9}{24}+\frac{10}{24}=\frac{19}{24}\).
\(\frac{7}{10}-\frac{1}{4}=\frac{14}{20}-\frac{5}{20}=\frac{9}{20}\).
\(2\frac{1}{3}+1\frac{5}{6}=2\frac{2}{6}+1\frac{5}{6}=3\frac{7}{6}=4\frac{1}{6}\).
\(6\frac{5}{12}-2\frac{7}{18}=6\frac{15}{36}-2\frac{14}{36}=4\frac{1}{36}\).
\(\frac{14}{15}\cdot\frac{25}{28}=\frac{5}{6}\).
\(3\frac{3}{4}:1\frac{1}{2}=\frac{15}{4}:\frac{3}{2}=\frac{15}{4}\cdot\frac{2}{3}=\frac{5}{2}=2\frac{1}{2}\).
\(6-2\frac{3}{5}=3\frac{2}{5}\).
\(11-3\frac{5}{22}=7\frac{17}{22}\).

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