我和妈妈一共包了49个饺子,其中我包了7个,妈妈包了几个?8B,]:w1U7{,D
算式:提示*w8s,u.F3M2v8B,]:w1U7{,D
口答:妈妈包了7f)K7t4n0L1y2w1P6j/F个。8B,]:w1U7{,D