混合果汁，学习分数加法！
1/5 + 2/5 = ____
1/4 + 1/4 = ____
3/10 + 4/10 = ____
2/6 + 1/6 = ____ (化简)
1/2 + 1/4 = ____
1/3 + 1/6 = ____
1/4 + 1/4 + 1/4 = ____
1/4 + 1/6 = ____
3/8 + 1/8 = ____
1/6 + 1/3 + 1/2 = ____
2/3 + 1/4 = ____
小明吃了披萨的1/4，小红吃了1/3，他们一共吃了____？