Đáp án:
Giải thích các bước giải:
\(\begin{array}{l}
a.\frac{{4.7}}{{9.4.8}} = \frac{7}{{9.8}} = \frac{7}{{72}}\\
b.\frac{{3.3.7}}{{2.7.3.5}} = \frac{3}{{2.5}} = \frac{3}{{10}}\\
c.\frac{{2.5.13}}{{2.13.5.7}} = \frac{1}{7}\\
d.\frac{{9.\left( {6 - 3} \right)}}{{3.6}} = \frac{{3.3.3}}{{3.2.3}} = \frac{3}{2}\\
e.\frac{{17.2.2}}{{ - 17}} = - 4\\
f.\frac{{7.7.8}}{{7.7}} = 8
\end{array}\)
