4. Упростите выражения: а) $\frac{11}{13}x+\frac{2}{13}x$; б) $\frac{7}{8}a-\frac{9}{16}a$; в) $5\frac{1}{6}b+\frac{2}{3}b$; г) $7\frac{3}{4}y-2\frac{7}{8}y$; д) $2\frac{1}{2}x-(1\frac{1}{4}x-\frac{1}{2}x)$; е) $3\frac{4}{5}x-(2\frac{3}{4}x-1\frac{1}{5}x)$; ж) $3\frac{7}{15}x-(2\frac{1}{2}x-1\frac{3}{15}x)$; з) $4\frac{7}{32}x-(3\frac{3}{4}x-1\frac{7}{32}x)$.

Question

Вопрос: $Фото задания: 4. Упростите выражения: а) $\frac{11}{13}x+\frac{2}{13}x$; б) $\frac{7}{8}a-\frac{9}{16}a$; в)…$ Фото задания

Accepted Answer

\[\frac{11}{13}x+\frac{2}{13}x=\frac{13}{13}x=x.\]
\[\frac{7}{8}a-\frac{9}{16}a=\frac{14}{16}a-\frac{9}{16}a=\frac{5}{16}a.\]
\[5\frac{1}{6}b+\frac{2}{3}b=5\frac{1}{6}b+\frac{4}{6}b=5\frac{5}{6}b.\]
\[7\frac{3}{4}y-2\frac{7}{8}y=7\frac{6}{8}y-2\frac{7}{8}y=4\frac{7}{8}y.\]
\[2\frac{1}{2}x-(1\frac{1}{4}x-\frac{1}{2}x)=2\frac{1}{2}x-\frac{3}{4}x=1\frac{3}{4}x.\]
\[3\frac{4}{5}x-(2\frac{3}{4}x-1\frac{1}{5}x)=3\frac{4}{5}x-1\frac{11}{20}x=2\frac{1}{4}x.\]
\[3\frac{7}{15}x-(2\frac{1}{2}x-1\frac{3}{15}x)=3\frac{7}{15}x-1\frac{1}{3}x=2\frac{2}{15}x.\]
\[4\frac{7}{32}x-(3\frac{3}{4}x-1\frac{7}{32}x)=4\frac{7}{32}x-2\frac{11}{32}x=1\frac{28}{32}x=1\frac{7}{8}x.\]

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