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\(\left(\frac{-5}{3}+\frac{3}{5}\right):\left|\frac{-1}{2}-0,6\right|\)
= \(\left(\frac{-25}{15}+\frac{9}{15}\right):\left|\frac{-1}{2}-\frac{6}{10}\right|.\)
= \(\frac{-16}{15}:\left|\frac{-5}{10}-\frac{6}{10}\right|.\)
= \(\frac{-16}{15}:\left|\frac{-11}{10}\right|.\)
= \(\frac{16}{15}:\frac{11}{10}.\)
= \(\frac{16}{15}\cdot\frac{10}{11}.\)
= \(\frac{32}{33}.\)
a.
\(\left(1\frac{1}{4}+\frac{3}{5}\right):\left(-\frac{11}{12}\right)+\left(\frac{3}{8}-1\frac{2}{5}\right):\left(-\frac{11}{12}\right)\)
\(=\left(\frac{5}{4}+\frac{3}{5}+\frac{3}{8}-\frac{7}{5}\right):\left(-\frac{11}{12}\right)\)
\(=\left(\frac{13}{8}-\frac{4}{5}\right):\left(-\frac{11}{12}\right)\)
\(=\frac{33}{40}:\left(-\frac{11}{12}\right)\)
\(=\frac{33}{40}\cdot\left(-\frac{12}{11}\right)\)
\(=\frac{-9}{10}\)
b.
\(\left(\frac{3}{8}-1\frac{2}{5}\right):\left(-\frac{11}{15}\right)+\left(1\frac{1}{4}+\frac{3}{5}\right):\left(-\frac{11}{15}\right)\)
\(=\left(\frac{3}{8}-\frac{7}{5}+\frac{5}{4}+\frac{3}{5}\right):\left(-\frac{11}{15}\right)\)
\(=\left(\frac{13}{8}-\frac{4}{5}\right):\left(-\frac{11}{15}\right)\)
\(=\frac{33}{40}:\left(-\frac{11}{15}\right)\)
\(=\frac{33}{40}\cdot\left(-\frac{15}{11}\right)\)
\(=\frac{-9}{8}\)
\(a.=\dfrac{1}{2}-\dfrac{1}{3}-\dfrac{5}{3}+\dfrac{3}{2}+\dfrac{7}{3}-\dfrac{5}{2}=\dfrac{1+3-5}{2}-\dfrac{2+5-7}{3}=\dfrac{-1}{2}\)
\(b.\left(\dfrac{3}{4}-1\dfrac{1}{6}\right)^2:\sqrt{\dfrac{25}{144}}=\left(-\dfrac{5}{12}\right)^2:\dfrac{5}{12}=\dfrac{5}{12}\)
<=>3-1/4+2/3-5+1/3+6/5-6+7/4-3/2
<=>(3-5-6)+(-1/4+7/4)+(2/3+1/3)+6/5-3/2
<=>-14-3/2+1+6/5-3/2
<=>-13-3+6/5
<=>-16+6/5
<=>-80/5+6/5
<=>-74/5
\(A=3-\frac{1}{4}+\frac{2}{3}-5-\frac{1}{3}+\frac{6}{5}-6+\frac{7}{4}-\frac{3}{2}\)
\(\Rightarrow\left(3-5-6\right)+\left(-\frac{1}{4}+\frac{7}{4}\right)+\left(\frac{2}{3}+-\frac{1}{3}\right)-\frac{3}{2}+\frac{6}{5}\)
\(\Rightarrow-8+\frac{3}{2}+\frac{1}{3}-\frac{3}{2}+\frac{6}{5}=-8+\frac{1}{3}+\frac{6}{5}=-\frac{97}{15}\)
Chúc bạn may mắn nha !