1.tính
a, \(\frac{-3}{8}\)+\(\frac{5}{-12}\) b, \(\frac{3}{14}+\frac{-2}{7}\) c, \(\frac{3}{5}-\frac{-7}{10}-\frac{13}{-20}\)
d, \(\frac{1}{4}-\frac{5}{3}.\frac{3}{15}\) e,\(\frac{-3}{5}+\frac{2}{7}+\frac{2}{-5}+\frac{3}{5}+\frac{5}{7}\)
f, \(\frac{6}{19}.\frac{7}{11}+\frac{4}{11}.\frac{6}{19}+\frac{13}{19}\)
2. tìm x
\(x+\frac{-3}{5}=\frac{2}{10}\) b, \(x:\frac{4}{5}+\frac{-1}{3}=\frac{3}{5}\) c, \(\frac{-2}{7}:x-\frac{-3}{11}=\frac{4}{22}\) d, \(|x-\frac{4}{5}|=\frac{1}{2}-\frac{1}{3}-\frac{1}{6}\)
mọi người ơi mình đang cần gấp . hepl me !
