\(\frac{2}{5}:\frac{7}{15}-\frac{1}{2}=\frac{2}{5}\times\frac{15}{7}-\frac{1}{2}=\)\(\frac{6}{7}-\frac{1}{2}=\frac{12}{14}-\frac{7}{14}=\frac{5}{14}\)
Vậy biểu thức 2/5 : 7/15 - 1/2 = 5/14
Nhớ kết bạn với mk nhé!!!!!!!!!!!!!!!
\(\frac{2}{5}\): \(\frac{7}{15}\) -\(\frac{1}{2}\)
=\(\frac{2}{5}\)x\(\frac{15}{7}\)-\(\frac{1}{2}\)
= \(\frac{6}{7}\) -\(\frac{1}{2}\)
= \(\frac{12}{14}\) -\(\frac{7}{14}\)
= \(\frac{5}{14}\)
Plz no copy here.
bằng 5/14.k đúng cho minh