Xiao Na drank half a glass of milk and then filled it with water. After drinking half of it, he filled it with water. After drinking a third, he filled the glass with water, and then Xiao Na drank it all. mark
Xiao Na drank half a cup of milk (drank 1/2 cups of milk), filled it with water (left 1/2 cups of milk and 1/2 cups of water), and drank half (drank 1/2* 1/2 cups of milk). 1/2 *1/2+1/2 water) Drink one third (drink 1/3 * 1/2 milk,1/3 (1/) 2/3 (1/2 *1/2)+1/3 water) Drink all (2/3 * 1/2 milk, 2/3 * 1/2 milk.
Milk: 1
Water:1/2 *1/2+1/3 (1/2 *1/2)+(2/3 (1/2))
Milk/water =3/4
There is another simple method:
A * * * drank 2 and 1/3 cups, and milk was 1 cup, so water was 1 and 1/3 cups, and milk/water was 3/4.