Shakita Mangham and Furaha Love were also sentenced Thursday to five years' probation.
The 26-year-old mothers pleaded no contest in February to involuntary manslaughter for the June fire.
The women left the children in the care of two 8-year-old boys and initially told police the children were with a baby sitter. An investigation revealed they had lied.
Three of Mangham's children, aged three to seven, were killed in the fire. Two of Love's children were also killed. The 8-year-old boys escaped. Authorities say the fire was started by children playing with matches.
