'Already' in the Bible

All the descendants of Jacob were seventy people; Joseph was [already] in Egypt.

This is what everyone who is counted shall give [as he joins those already counted]: a half shekel, according to the sanctuary shekel (the shekel is twenty gerahs); a half shekel as a contribution to the Lord.

Everyone who is counted, from twenty years old and over, [as he joins those already counted], shall give this contribution to the Lord.