Yes!  Without question, CCSS expects students to know math facts “from memory.”  Students should not be counting on their fingers nor having to stop and think about basic math facts.

CCSS.Math.Content.2.OA.B.2 Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.
CCSS.Math.Content.3.OA.C.7 Fluently multiply and divide within 100, using strategies such as the relationship between multiplication and division (e.g., knowing that 8 × 5 = 40, one knows 40 ÷ 5 = 8) or properties of operations. By the end of Grade 3, know from memory all products of two one-digit numbers.

Worksheets alone will not get students to that place–it requires oral rehearsal of math facts until there are no hesitations.  That happens best with the kind of peer practice that Rocket Math is designed to provide.
Click here to see my basic math fact recommended benchmarks to use with Rocket Math to implement the Common Core.