例题:计算
原式\(\displaystyle =-27\div 9\times 8\)
\(\displaystyle =-24\)
原式\(\displaystyle =-1\div 9\times \frac{2}{9}-16\div 4\)
\(\displaystyle =-\frac{2}{{81}}-4\)
\(\displaystyle =-4\frac{2}{{81}}\)
\(\displaystyle =-9\div \left( {-\frac{9}{4}} \right)\times \frac{9}{4}-\frac{{16}}{3}\)
\(\displaystyle =-9\times \left( {-\frac{4}{9}} \right)\times \frac{9}{4}-\frac{{16}}{3}\)
\(\displaystyle =\frac{{27}}{3}-\frac{{16}}{3}\)
\(\displaystyle =\frac{{11}}{3}\)
