Why does the Torah not insert the word "le'Mishpechosam", like it did in the previous census (in Bamidbar)?
Ba'al ha'Turim: It is unnecessary, since it mentions 'Mishpachah' by each name independently. 1
What are the connotations of the word "Leimor"?
Rashi: Moshe and Elazar were to instruct Yisrael that they are obligated to participate in the census.
Seforno: In connection with the next Pasuk, Moshe and Elazar were to instruct Yisrael to divulge the details concerning their age.
Why did the Nesi'im not prticipate in the census, as they did in the first census in Ki Sisa?
Oznayim la'Torah: Following the pople's complainqt against Pinchas that he killed a Nasi in Yisrael - raisinf=g the Kavod of a Nasi above that of Hakadosh-Baruch-Hu, Hashem precluded them from the current census to teach them that where there is Chilul Hashem there is no Kavod Nasi. 1
See Oznayim la'Torah DH 'va'Yedaber Moshe ve'Elazar ha'Kohen' who elaborates.
