This child needs to talk aloud to learn

The child I am homeschooling has figured out that he needs to talk out loud to himself to work more efficiently.  He struggles to finish his math papers in a timely fashion.  He could not pass his timed math facts test.  Once he started saying his answers out loud as he took the test, his scores improved.
As he gains confidence in his ability to learn his math facts, I expect he will not need to talk as much.  I am learning to listen to how he needs to learn instead of how I want to teach. Success is easier for both of us.