[tex]a)6 \frac{3}{10}= \frac{6*10+3}{10}= \frac{63}{10};105 \frac{3}{4}= \frac{105*4+3}{4}= \frac{423}{4} \\ b) ^{3)} \frac{7}{3}= \frac{7*3}{3*3}= \frac{21}{9}; ^{3)} \frac{11}{12}= \frac{11*3}{12*3} = \frac{33}{36} \\ c) \frac{360}{540}^{(60}= \frac{6}{9}^{(3}= \frac{2}{3}; \frac{10}{15}^{(5}= \frac{2}{3} \\ d)0,001= \frac{1}{1000} [/tex]