The 29-year-old Dutchman has scored 17 goals in 22 Premier League appearances for the Red Devils since joining them from Arsenal last summer.
"Robin is a world-class striker and it's great to be playing alongside him," Welbeck told United's official website. "He is deadly in front of goal, but it's not just his goal scoring that he's added to the team.
"It's his all-round play. He is bringing others into the play very well and he's holding the ball up as well. As you watch him closer every single day you get to know how good a player he is.
"You can learn from Robin, but also other great players in the whole of the Manchester United squad."
United will take on Tottenham Hotspur away from home in the Premier League on Sunday.