解决方案 -\left[\begin{array}{lll}{3}&{5}&{-0.6}\\{9}&{\frac{9}{10}}&{-9}\end{array}\right]\div 2.4

\left[\begin{array}{lll}{-\frac{5}{4}}&{-\frac{25}{12}}&{\frac{1}{4}}\\{-\frac{15}{4}}&{-\frac{3}{8}}&{\frac{15}{4}}\end{array}\right]

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问题 :

-[beginarraylll3&5&-0.69&frac{910}&-9endarray]/ 2.4

- [39 5 \frac{9}{10} - 0.6 - 9] \div 2.4

[- \frac{5}{4} - \frac{15}{4} - \frac{25}{12} - \frac{3}{8} \frac{1}{4} \frac{15}{4}]

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