Yes. You can do this in two ways.
1. If you would like to change the grading strategy of all the problems in the assignment to "Allow final answer" or "Correct/Incorrect" then please go to assignment configuration using the "Options" menu and select the desired "Exercise grading strategy".
2. If you only would like to change the grading strategy for a few problems, then follow the steps below.
On the assignment page, select the exercise you like to grade according to the final answer.
From the options menu, click on “configure”.
At the “Exercise configuration page” turn on the “Advanced” button.
Finally, select “Allow just final answer” from “Math grading strategy”.
Notice that there are many grading strategies to choose from, and their descriptions can be found under the "Description" link located right underneath "Math grading strategy". Once you click on the link, the descriptions of the available grading strategies will be shown on a pop-up window.