How to create a child theme with multiple css files.

Your question is general, so I cannot answer it in details.

If the parent theme enqueues some styles using get_stylesheet_directory_uri() in the path they won’t be available in child theme. Then you should enqueue lacking stylesheets in your child’s function.php using get_template_directory_uri() which will point to the parent theme directory.

Some example:

add_action( 'wp_enqueue_scripts', 'wpse179217_enqueue_styles' );
function wpse179217_enqueue_styles() {
  wp_enqueue_style( 'parent_name-style', get_template_directory_uri() . '/style.css' );
  wp_enqueue_style( 'parent_name-odometerstyle', get_template_directory_uri() . '/css/odometer-theme-default.css', array(), '' );
  wp_enqueue_style( 'parent_name-animate', get_template_directory_uri() . '/css/animate.css', array(), '1.0' );
  wp_enqueue_style( 'child_name-style', get_stylesheet_uri(), array( 'parent_name-style' ) );
}