simple

Don‘t worry if you‘ve never been to dance class before. We‘ll start the lesson with something really simple.

Actually that was a pretty simple problem for me.

child‘s play

This system is child‘s play. It won‘t take you more than five minutes to learn.

I’ve cooked for 200 people before now. So, tonight is child’s play by comparison.

Uncomplicated

This new software is very uncomplicated compared with the old one.

Painless

The visa application process is relatively painless if you have the right documents.

straightforward

This recipe is very straightforward. A child could do it.

a piece of cake

Such kind of work is just a piece of cake for Seline.

Don‘t worry, you‘ll pass the exam; it‘s a piece of cake.