Đáp án:
12) 145
Giải thích các bước giải:
\(\begin{array}{l}
11)\sqrt {\dfrac{4}{{100}}} + \dfrac{3}{5} - \sqrt {\dfrac{{25}}{{100}}} + \dfrac{{113}}{{10}}\\
= \dfrac{2}{{10}} + \dfrac{6}{{10}} - \dfrac{5}{{10}} + \dfrac{{113}}{{10}} = \dfrac{{116}}{{10}} = \dfrac{{58}}{5}\\
12)11.\left( {15 - \dfrac{{23}}{{11}}} \right) + 3\\
= 165 - 23 + 3 = 145\\
13)\sqrt {\dfrac{{49}}{{100}}} .\left( {\dfrac{1}{9} + \dfrac{1}{3} - 1} \right) + {\left( {\dfrac{2}{5}} \right)^5}.{\left( {\dfrac{5}{2}} \right)^5}\\
= \dfrac{7}{{10}}.\left( { - \dfrac{5}{9}} \right) + 1 = - \dfrac{7}{{18}} + 1 = \dfrac{{11}}{{18}}
\end{array}\)
