About Stationary

列出算式，把相應的英语数字写在横线上。

There are two horses on the farm.

Two more horses come.

How many horses are there in all？

_______________________ horses

There are ten fish in the river.

Three fish swim away.

How many fish are left？

_______________________ fish

There are seven hens.

Eight more hens come.

How many hens are there in all？

_______________________ hens

There are eight dogs.

Four dogs go away.

How many dogs are left？

_______________________ dogs