tính :
\(\frac{3}{5}\)+\(\frac{7}{2}\)-\(\frac{4}{7}\) ; \(\frac{4}{5}\)-\(\frac{1}{3}\)+\(\frac{3}{4}\) ; \(\frac{1}{3}\)x \(\frac{5}{7}\): \(\frac{7}{2}\) ; \(\frac{1}{2}\): \(\frac{2}{7}\)x \(\frac{4}{7}\) ; \(\frac{19}{15}\)x \(\frac{3}{7}\): \(\frac{4}{9}\) ; \(\frac{11}{3}\): \(\frac{9}{16}\):\(\frac{3}{8}\)
NHỚ LÀM CHO ĐÚNG CHÍNH SÁC CHUẨN NHA, À CÒN NỮA, ĐÂY LÀ TOÁN LỚP 4, NHỚ LÀM ĐÚNG NHA !
\(1,\frac{3}{5}+\frac{7}{2}-\frac{4}{7}=\frac{42}{70}+\frac{245}{70}-\frac{40}{70}=\frac{247}{70}\)
\(2,\frac{4}{5}-\frac{1}{3}+\frac{3}{4}=\frac{48}{60}-\frac{20}{60}+\frac{45}{60}=\frac{73}{60}\)
\(3,\frac{1}{3}\times\frac{5}{7}:\frac{7}{2}=\frac{5}{21}:\frac{7}{2}=\frac{10}{147}\)
\(4,\frac{1}{2}:\frac{2}{7}\times\frac{4}{7}=\frac{7}{4}\times\frac{4}{7}=1\)
\(5,\frac{19}{15}\times\frac{3}{7}:\frac{4}{9}=\frac{19}{35}:\frac{4}{9}=\frac{171}{140}\)
\(6,\frac{11}{3}:\frac{9}{16}:\frac{3}{8}=\frac{176}{27}:\frac{3}{8}=\frac{1408}{81}\)
_Chúc bạn học tốt _
