\(\frac{4}{5}+\frac{3}{7}+\frac{3}{7}x\frac{1}{5}+\frac{17}{7}\)
\(=\frac{4}{5}+\frac{3}{7}+\frac{3}{35}+\frac{17}{7}\)
\(=\left(\frac{4}{5}+\frac{3}{35}\right)+\left(\frac{3}{7}+\frac{17}{7}\right)\)
\(=\frac{23}{35}+\frac{20}{17}\)
\(\frac{4}{5}×\frac{3}{7}+\frac{3}{7}×\frac{1}{5}+\frac{17}{7}\)
\(=\frac{3}{7}×\left(\frac{4}{5}+\frac{1}{5}\right)+\frac{17}{7}\)
\(=\frac{3}{7}×\frac{5}{5}+\frac{17}{7}\)
\(=\frac{3}{7}×1+\frac{17}{7}\)
\(=\frac{3}{7}+\frac{17}{7}\)
\(=\frac{3+17}{7}\)
\(=\frac{20}{7}\)
\(\frac{4}{5}\times\frac{3}{7}+\frac{3}{7}\times\frac{1}{5}+\frac{17}{7}\)
\(=\frac{3}{7}\times\left(\frac{4}{5}+\frac{1}{5}\right)+\frac{17}{7}\)
\(=\frac{3}{7}\times1+\frac{17}{7}\)
\(=\frac{3}{7}+\frac{17}{7}\)
\(=\frac{20}{7}\)
tk mình nha!
Mình nhanh nhất nè!
KB nha mọi người.
mình đố cho vui thôi chứ mình giải ra lâu rồi
