Resuelve las siguientes operaciones :
a) 4 1 / 5 - 6 / 7 + 2 1 / 3 =
<img src="https://tex.z-dn.net/?f=4%5C%3A%5Cfrac%7B1%7D%7B5%7D-%5Cfrac%7B6%7D%7B7%7D%2B2%5C%3A%5Cfrac%7B1%7D%7B3%7D" />
<img src="https://tex.z-dn.net/?f=4%5Cfrac%7B1%7D%7B5%7D%3D%5Cfrac%7B21%7D%7B5%7D%20%20%3B%202%5Cfrac%7B1%7D%7B3%7D%3D%5Cfrac%7B7%7D%7B3%7D" />
<img src="https://tex.z-dn.net/?f=%5Cfrac%7B21%7D%7B5%7D-%5Cfrac%7B6%7D%7B7%7D%2B%5Cfrac%7B7%7D%7B3%7D" />
<img src="https://tex.z-dn.net/?f=%5Cfrac%7B21%5Ccdot%20%5C%3A21%7D%7B105%7D-%5Cfrac%7B6%5Ccdot%20%5C%3A15%7D%7B105%7D%2B%5Cfrac%7B7%5Ccdot%20%5C%3A35%7D%7B105%7D" />
<img src="https://tex.z-dn.net/?f=%5Cfrac%7B21%5Ccdot%20%5C%3A21-6%5Ccdot%20%5C%3A15%2B7%5Ccdot%20%5C%3A35%7D%7B105%7D" />
<img src="https://tex.z-dn.net/?f=%5Cfrac%7B596%7D%7B105%7D%3D5%5Cfrac%7B71%7D%7B105%7D" />
b) 3 7 / 9 x 5 7 / 8 =
<img src="https://tex.z-dn.net/?f=3%5C%3A%5Cfrac%7B7%7D%7B9%7D%5Ccdot%205%5Cfrac%7B7%7D%7B8%7D" />
<img src="https://tex.z-dn.net/?f=3%5Cfrac%7B7%7D%7B9%7D%3D%5Cfrac%7B34%7D%7B9%7D%20%20%3B%20%205%5Cfrac%7B7%7D%7B8%7D%3D%5Cfrac%7B47%7D%7B8%7D" />
<img src="https://tex.z-dn.net/?f=%5Cfrac%7B34%7D%7B9%7D%5Ccdot%20%5Cfrac%7B47%7D%7B8%7D" />
<img src="https://tex.z-dn.net/?f=%5Cfrac%7B34%5Ccdot%20%5C%3A47%7D%7B9%5Ccdot%20%5C%3A8%7D%3D%5Cfrac%7B1598%7D%7B72%7D%3D%5Cfrac%7B799%7D%7B36%7D%0A" />
c) 7 2 / 3 ÷ 2 4 / 5 =
[img = 10]
[img = 11]
[img = 12].