Giải câu 2 trang 177 toán tiếng anh lớp 4.
a)
\(\frac{2}{5}\) + \(\frac{3}{10}\) - \(\frac{1}{2}\) = \(\frac{4}{10}\) + \(\frac{3}{10}\) - \(\frac{5}{10}\) = \(\frac{7}{10}\) - \(\frac{5}{10}\) = \(\frac{2}{10}\) = \(\frac{1}{5}\)
b)
\(\frac{8}{11}\) + \(\frac{8}{33}\) x \(\frac{3}{4}\) = \(\frac{8}{11}\) + \(\frac{2}{11}\) = \(\frac{10}{11}\)
c)
\(\frac{7}{9}\) x \(\frac{3}{14}\) : \(\frac{5}{8}\) = \(\frac{1}{6}\) : \(\frac{5}{8}\) = \(\frac{1}{6}\) x \(\frac{8}{5}\) = \(\frac{8}{30}\) = \(\frac{4}{15}\)
d)
\(\frac{5}{12}\) - \(\frac{7}{32}\) : \(\frac{21}{16}\) = \(\frac{5}{12}\) - \(\frac{7}{32}\) x \(\frac{16}{21}\) = \(\frac{5}{12}\) - \(\frac{1}{6}\) = \(\frac{5}{12}\) - \(\frac{2}{12}\) = \(\frac{3}{12}\)