By Peter ORourke
Last Updated: 01/01/70 1:00am
Spanish midfielder Mikel Arteta broke the deadlock for the hosts right on the stroke of half time and Maurice Ross added a second two minutes after the break.
Young French star Hamed Namouchi put the game beyond Motherwell with the third on 51 minutes and Steven Thompson made it four after 55 minutes.
Hearts cemented their place in third spot with an impressive 2-0 win at Dundee United.
Giant Dutch striker Mark de Vries gave Hearts the perfect start with the opener after just four minutes.
Andy Webster grabbed a second for Hearts on 72 minutes with Andy Webster finding the net.
Kilmarnock produced a brilliant comeback to fight back from two goals down to beat Livingston 4-2 at Rugby Park.
Lee Makel fired the visitors in front on 13 minutes and Burton O'Brien doubled the lead after 23 minutes.
Colin Nish pulled a goal back for Killie on 54 minutes and Mark Canning levelled matters after 74 minutes.
Nish netted his second five minutes later to give Kille the lead and Gary McSwegan completed the comeback with the fourth three minutes from time
Partick recorded only their fifth SPL win of the season with a 2-0 victory over Aberdeen at Firhill.
James Grady gave the bottom club the lead on ten minutes and Jamie Mitchell wrapped up the win with the second ten minutes from the end.
Hibernian moved up to seventh with a narrow 1-0 win over Dundee at Easter Road.
Derek Riordan grabbed the only goal of the game three minutes before the break to give managerless Hibs all three points
Click on fixture for full match summary