Simply press and hold Super+Q. You should see numbers appearing next to the application icons. Then release Q and press the number associated to your target application to launch it.
You can alternatively press Super+number directly to launch the application without pressing Super+Q first.
Notes:
- If pressing Super+Q fails to show the numbers, run the following command first.
gsettings set org.gnome.shell.extensions.dash-to-dock hot-keys false - This shortcut only works with the keyboard’s top row number keys, not those of the numpad. You can install a GNOME shell extension called AppKeys to make it work with the numpad too.