Viết số thích hợp vào ô trống:
a) \( \frac{7}{2}=\frac{7 \times \square }{2\times\square }=\frac{\square }{10}\) ;
b) \( \frac{3}{4}=\frac{3\times \square }{4\times \square }=\frac{\square }{100}\) ;
c) \( \frac{6}{30}=\frac{6:\square }{30:\square }=\frac{\square }{10}\) ;
d) \( \frac{64}{800}=\frac{64:\square }{800:\square }=\frac{\square }{100}\) .
a) \( \frac{7}{2}=\frac{7\times 5 }{2 \times 5}=\frac{35}{10}\) ;
b) \( \frac{3}{4}=\frac{3\times 25 }{4\times 25 }=\frac{75}{100}\) ;
c) \( \frac{6}{30}=\frac{6:3}{30:3 }=\frac{2 }{10}\) ;
d) \( \frac{64}{800}=\frac{64:8}{800:8 }=\frac{8 }{100}\)
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