Question

[Bùi Linh Chi]

Làm kiểu j ???

Answer 1

[nguyen thi oanh]

A)\(\left[5\frac{3}{72}-\left(2\frac{1}{8}-2\frac{1}{24}\right)\right]:\left(\frac{21}{32}+\frac{56}{96}\right)\)

= \(\left[\frac{363}{72}-\left(\frac{17}{8}-\frac{49}{24}\right)\right]:\left(\frac{21.3+56}{96}\right)\)

=\(\left[\frac{363}{72}-\left(\frac{17.9-49.3}{72}\right)\right]:\frac{119}{96}\)

=\(\left[\frac{363}{72}-\frac{6}{72}\right]:\frac{119}{96}\)

=\(\frac{357}{72}.\frac{96}{119}\)

=   4

B) \(\left(4\frac{1}{2}-3\frac{3}{4}\right):\frac{2}{5}.\frac{1}{5}-0,3125:\frac{5}{6}\)

\(=\left(\frac{9}{2}-\frac{15}{4}\right):\frac{2}{5}.\frac{1}{5}-\frac{5}{16}:\frac{5}{6}\)

\(=\left(\frac{18-15}{4}\right).\frac{5}{2}.\frac{1}{5}-\frac{5}{16}.\frac{6}{5}\)

\(=\frac{3}{4}.\frac{5}{2}.\frac{1}{5}-\frac{3}{8}\)

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

\(=0\)