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\(=-\dfrac{6}{5}:\left(\dfrac{6}{5}\cdot\dfrac{5}{4}\right):\dfrac{16}{25}-\dfrac{1}{25}+\left(1.04\right)\cdot\dfrac{4}{7}:\left(5:\dfrac{5}{9}-\dfrac{9}{4}\right)\cdot\dfrac{36}{17}+\dfrac{3}{10}\cdot\dfrac{5}{2}\)
\(=\dfrac{-6}{5}\cdot\dfrac{4}{6}\cdot\dfrac{25}{16}-\dfrac{1}{25}+\dfrac{1664}{8925}+\dfrac{3}{4}\)
\(=\dfrac{-27}{50}+\dfrac{1664}{8925}=-\dfrac{6311}{17850}\)
\(M=\left(-\dfrac{6}{5}:\left(\dfrac{8}{5}\cdot\dfrac{5}{4}\right):\dfrac{16}{25}-\dfrac{1}{25}\right)+\left[\left(1.08-0.08\right)\cdot\dfrac{7}{4}:\left(5+\dfrac{5}{9}-\dfrac{9}{4}\right)\cdot\dfrac{36}{17}\right]+0.3\cdot\dfrac{5}{2}\)
\(=\left(-\dfrac{6}{5}\cdot\dfrac{1}{2}\cdot\dfrac{16}{25}-\dfrac{1}{25}\right)+\left[\dfrac{7}{4}:\cdot\dfrac{36}{119}\cdot\dfrac{36}{17}\right]+0.75\)
\(=-\dfrac{53}{125}+\dfrac{324}{289}+0.75\simeq1,45\)
0,75.1/2.25/6.(-1)^2=25/16.1=25/16
5,7+3,6-3.(1.2-2.8)=9,3-3.(-1,6)=9,3-(-4,8)=14,1
1,2(25)=1,2+0,0(25)=1,2+0,0(01).25
=1,2+1/990.25
=12/10+5/198=1213/990
=>mẫu số là 990
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