solid feeding question

Na

Went to the dr today, and she said to start my daughter (4mo) on solids twice a day (yay!!). My question (that I forgot to ask) is, when feeding solids do you also give a smaller amount of formula after it. She ate the whole jar of peas which was one serving, but only 2.5oz, and still seemed hungry afterward. She usually drinks 6oz bottles, so I didn't know if I should give her 3 or 4 oz of formula after the jar?