1)
What is "ka'Mispar asher Ta?asu" coming to teach us?
1.
Rashi and Targum Yonasan: It teaches us that however many bulls, rams or lambs one brings, one must bring the equivalent number of Menachos.
1
2.
Sifri: It teaches us that one is not premitted to detract from the specified amounts, and "Kachah Ta'asu ... ", that one may also not add to them.
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2
See Torah Temimah, note 24.