2 вариант. Вычисли: 1) 5 2/9 + 3 4/9; 2) 2 3/8 + 4 1/6; 3) 6 7/12 + 1 5/8; 4) 9 + 2 5/11; 5) 4 7/10 + 3 3/10; 6) 8 3/4 − 5 1/4; 7) 7 1/5 − 3 3/5; 8) 5 − 1 7/9; 9) 6 5/8 − 3 5/8; 10) 4 1/5 · 3; 11) 3 1/7 · 7/22; 12) 1 3/4 : 2 2/7; 13) 1 1/3 · 4 1/2; 14) 9 1/3 : 7; 15) 5 1/4 : 7/8; 16) 4 4/9 : 1 7/9; 17) 8 : 1 3/5.

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Accepted Answer

\(5\frac{2}{9}+3\frac{4}{9}=8\frac{6}{9}=8\frac{2}{3}\).
\(2\frac{3}{8}+4\frac{1}{6}=\frac{19}{8}+\frac{25}{6}=\frac{89}{12}=7\frac{5}{12}\).
\(6\frac{7}{12}+1\frac{5}{8}=\frac{79}{12}+\frac{13}{8}=\frac{197}{24}=8\frac{5}{24}\).
\(9+2\frac{5}{11}=11\frac{5}{11}\).
\(4\frac{7}{10}+3\frac{3}{10}=8\).
\(8\frac{3}{4}-5\frac{1}{4}=3\frac{1}{2}\).
\(7\frac{1}{5}-3\frac{3}{5}=6\frac{1}{5}-3\frac{3}{5}=3\frac{3}{5}\).
\(5-1\frac{7}{9}=3\frac{2}{9}\).
\(6\frac{5}{8}-3\frac{5}{8}=3\).
\(4\frac{1}{5}\cdot3=\frac{21}{5}\cdot3=12\frac{3}{5}\).
\(3\frac{1}{7}\cdot\frac{7}{22}=\frac{22}{7}\cdot\frac{7}{22}=1\).
\(1\frac{3}{4}:2\frac{2}{7}=\frac{7}{4}:\frac{16}{7}=\frac{49}{64}\).
\(1\frac{1}{3}\cdot4\frac{1}{2}=\frac{4}{3}\cdot\frac{9}{2}=6\).
\(9\frac{1}{3}:7=\frac{28}{3}:7=\frac{4}{3}=1\frac{1}{3}\).
\(5\frac{1}{4}:\frac{7}{8}=\frac{21}{4}\cdot\frac{8}{7}=6\).
\(4\frac{4}{9}:1\frac{7}{9}=\frac{40}{9}:\frac{16}{9}=\frac{5}{2}=2\frac{1}{2}\).
\(8:1\frac{3}{5}=8:\frac{8}{5}=5\).

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