Australia warmed up for next Saturday's crunch game against England, with a comfortable win over Pool A minnows Uruguay at Villa Park.
The result was never in doubt for the second best side in the world, who were a class apart from their South American opponents despite making a raft of changes to their starting XV.
It wasn't all plain sailgin for the Wallabies, who had Quade Cooper sin-binned early on, with the fly-half only converting five of his 11 shots at goal.
Bonus point confirmed in first half
After being criticised in some quarters for failing to score four tries in their win over Fiji on Wednesday, it was no such problem in Birmingham.
They picked up the try bonus on the half-hour mark, thanks to tries from Sean McMahon, Joe Tomane, Dean Mumm and Henry Speight.
Ben McCalman added another five pointer for Cheika's men, who conceded three points against the 19th ranked side after being penalised midway through the half, with Felipe Barchesi doing the business from the tee.
Mitchell comes alive after the break
The game was over as a contest, and the second half became a chance for the Australian players to express themselves and try to force themself into next week's starting team.
Drew Mitchell scored twice to move to 12 Rugby World Cup tries over three tournaments, passing Chris Latham as the Australian leader in World Cup tries.
McCalman and McMahon added their second scores after some excellent build-up play, with Matt Toomua and Tevita Kuridrani adding some late gloss to the scoreline with their efforts.
The only worry for the Australians, was the injury picked up by Will Skelton, who exited in the second half after taking a blow to his shoulder.
Australia join Wales at the top of Pool A, with each of the sides having played twice.