Removing some cells from a function.

Hey.

Is there a way to remove some cells from a function in another cell?

I got a function that adds together A1:A10 in B1, but now I wan't to calculate something in A7 and I don't want that to be calculated in B1.

Is there a way to do this? So that A7 won't get mixed in with the A1:A10?

Thank you.