Xiao Ming's family wants to pack jiaozi. The main raw materials are flour, fresh meat and vegetables. The following figure shows the fractions of the three raw materials needed to make this jiaozi. Flour: fresh meat: vegetables: 1: When making this jiaozi, the mass ratio of flour, fresh meat and vegetables is: (4): (2): (1). 2. To make this jiaozi, these three raw materials were used ***2. 1 kg. How many kilograms are used for each raw material? Solution: 4+2+ 1=7 Flour: 2. 1× 4/7 = 1.2kg Fresh meat: 2. 1× 2/7 = 0.6kg Vegetable: 2.1×/.