4-5/7=23/7
1/2:3=1/6
578,97x307=177743,79
266,22:34=7,83
4-5/7=28/5
1/2:3=1/6
578,97nhân307=177743.79
266,22:34=7.83
4 - 5/7 = 28/7 - 5/7 = 23/7
1/2 : 3 = 1/2 . 1/3 = 1/6
578,97 * 307 = 177743,79
266,22 : 34 = 7,83
4-\(\frac{5}{7}\)= \(\frac{28}{7}\)-\(\frac{4}{7}\) = \(\frac{24}{7}\)
\(\frac{1}{2}\): 3=\(\frac{1}{6}\)
578,97 x 307 =177743,79
266,22:34=7,83
Chúc em học tốt