4x2/7=8/7
8/7:2/7=8/7x7/2=4
8/7:4=8/7x1/4=2/7
2/7x4=1/14
4 x \(\frac{2}{7}\) = \(\frac{4x2}{7}\) = \(\frac{8}{7}\)
\(\frac{8}{7}\) : \(\frac{2}{7}\) = \(\frac{8}{7}\) x \(\frac{7}{2}\) = \(\frac{8x7}{7x2}\) = \(\frac{56}{14}\) = 4
\(\frac{8}{7}\) : 4 = \(\frac{8}{7x4}\) = \(\frac{8}{28}\) = \(\frac{2}{7}\)
\(\frac{2}{7}\) x 4 = \(\frac{2x4}{7}\) = \(\frac{8}{7}\)
tk mk nhé lưu kim linh
ai thấy đúng thì tk mk nha
cảm ơn các bn
4x2/7=8/7
8/7:2/7=4
8/7:4=2/7
2/7x4=8/7
Kết bạn với mình nha ! k cho mình nhé !
4 * \(\frac{2}{7}=\frac{4x2}{7}=\frac{8}{7}\)
\(\frac{8}{7}:\frac{2}{7}=\frac{8}{7}x\frac{7}{2}=\frac{8x7}{7x2}=\frac{56}{14}=4\)
\(\frac{8}{7}:4=\frac{8}{7x4}=\frac{8}{28}=\frac{2}{7}\)
\(\frac{2}{7}x4=\frac{2x4}{7}=\frac{8}{7}\)