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How to calculate the net growth of population

Net population growth = number of births-number of deaths+number of immigrants. Net population growth refers to the difference between the number of births and deaths in a certain area in a certain period, plus the number of immigrants in that area. The formula is: net increase population = birth population-death population+immigrant population. For example, if there are 654.38+10,000 people born, 50,000 people died and 20,000 people immigrated in a year in a certain area, the population in this area will increase by 70,000.