Can you solve them?

算一算，把相應的英语数字写在横线上。

There are eight butterflies.

Three butterflies fly away.

How many butterflies are left？

________-________=________

Sam has thirteen apples in a bag.

Sam gives four apples away.

How many apples does Sam have now？

________-________=________

There are twelve rabbits in the house.

Six rabbits go into the field.

How many rabbits are there in the house？

________-________=________

I have eleven cherries.

My brother eats up seven cherries.

How many cherries do I have now？

________-________=________