written “out of 5”

Please post the url to a relevant page.

Thanks
https://www.wasciu.com/categoria-prodotto/listino-prezzi-pubblicita-generica/

in css

.add_to_cart_button{
display: none;
}

I’m sorry I have to put this code in the theme child?

If you have WP 4.7, custom css can be entered at:
Dashboard > Appearance > Customise > Additional CSS

perfect thank you so much, now I try add, thank you so much