They allegedly ambushed pedestrians, stealing their phones, wallets and bags.
Two of the victims – a 36-year-old Clayton man and a 21-year-old Cheltenham woman – received minor injuries during the alleged robberies.
Three other men targeted were uninjured.
Police from the Box Hill Embona and Dandenong Southern Metro Crime Team have charged the teens with armed robbery and robbery.
The group includes two 17-year-old boys, one from Cranbourne West and one from Collingwood, a 16-year-old Hallam boy, and three 15-year-old boys from Clyde North, Cranbourne and one of no fixed address.
They will all appear before a Children’s Court at a later date.
In a separate investigation, police are continuing to look into the organised theft of electronic goods by a group of mostly teenagers from electronic goods stores – including some JB Hi-Fi stores – across Melbourne between August 22 and September 1.
Police allege that high-quality electronic products were stolen from stores in Airport West, Sunshine, Brunswick, Hoppers Crossing, Maribyrnong, Brighton, Epping, Thomastown, Pakenham and Nunawading.
Eleven people were arrested in Kealba, in Melbourne’s north-west, over the robberies on September 1.
Six of those were charged and bailed, or remanded, and were all aged under 18.
Investigators are urging anyone who may have witnessed these incidents to contact Crime Stoppers on 1800 333 000 or visit www.crimestoppersvic.com.au