Adding Stitches

I’m knitting a toy elephant for my niece
&&these are my next instructions

Legs and Body: Add 35 stitches at the end of the next 2 rows.

Do I just cast on 35 stitches, knit the row
than cast on 35 more stitches to the next row??

Yes, use either the knitted or cable cast ons for a firmer edge.