Question on vector operations in the new 20110228 version of Grasshopper

Hello to everybody. Grasshopper is just fabulous.

My question is: I have noticed that in the latest 20110228 version, basic vector's operations like addition, divide and multiply do not appear. The same with real numbers' operations. As a matter of fact, I cannot see them after the 060059 version. How can I acquire or make these operations work in the latest versions of Grasshopper? Thank you very much and kind regards.