Question

tính

a)\(\frac{5}{6}\cdot\frac{3}{4}:2\)

b) \(\frac{2}{5}\cdot\frac{4}{7}:2\)

Answer 1

a:\(\frac{5}{6}\)-\(\frac{3}{4}\):2

=\(\frac{5}{6}\)-\(\frac{3}{4}\):\(\frac{2}{1}\)

=\(\frac{5}{6}\)-\(\frac{3}{8}\)

=\(\frac{11}{24}\)

Answer 2

a) \(\frac{5}{6}.\frac{3}{4}:2\)= \(\frac{5}{8}x\frac{1}{2}\)= \(\frac{5}{16}\)

b) \(\frac{2}{5}.\frac{4}{7}:2\)= \(\frac{8}{35}x\frac{1}{2}\)= \(\frac{8}{70}\)

Đúng 100%

Answer 3

b=\(\frac{2}{5}\)-\(\frac{4}{7}\):\(\frac{2}{1}\)

=\(\frac{2}{5}\)-\(\frac{1}{3}\)

=\(\frac{6}{15}\)-\(\frac{5}{15}\)

=\(\frac{1}{15}\)

k cho minh