Thực hiện phép tính sau: k) 2 2/ 3 : [ ( 3 , 72 − 0 , 02 ) ⋅ 10 /37 ] : 5/ 6 + 2 , 8 } − 7 /15 .
Giải thích
k) \(2\frac{2}{3}:\left\{ {\left[ {\left( {3,72 - 0,02} \right).\frac{{10}}{{37}}} \right]:\frac{5}{6} + 2,8} \right\} - \frac{7}{{15}}\)
\[ = \frac{8}{3}:\left[ {\left( {3,7.\frac{{10}}{{37}}} \right):\frac{5}{6} + 2,8} \right] - \frac{7}{{15}}\]
\( = \frac{8}{3}:\left( {1:\frac{5}{6} + 2,8} \right) - \frac{7}{{15}} = \frac{8}{3}:4 - \frac{7}{{15}} = \frac{1}{5}\)