Question

tinh :

4 phan 7* 5 phan 6 +5 phan 7 *5 phan 6 ; 1 phan 2 :3 * 1 phan 2

Answer 1

\(\frac{4}{7}.\frac{5}{6}.\frac{5}{7}.\frac{5}{6}=\frac{4.5.5.5}{7.6.7.6}=\frac{500}{1764}=\frac{125}{441}\)\(\frac{1}{2:3}.\frac{1}{2}=\frac{1}{2:3.2}\)(Có thể đề thíu)