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The third grade mathematics composite statistics table Volume II short story, about 50 words.
Today, my father gave me a task to estimate the number of people in Chen Kai community.

How can I finish this task? You can't let me count them one by one, can you? I've been thinking about it for a long time. If I could know how many houses there are in Chen Kai community, how many families there are in each house and how many people there are in each family, I would come out!

How do I know how many houses there are in Chen Kai community? As I remember, there was a map showing the distribution of communities in Chen Kai. I'll go downstairs and find the distribution map right away. I see that the biggest house number on the distribution map is 16 1. But not all 16 1 buildings are the same height. There are villas, small high-rise buildings and multi-storey apartments. There are three small high-rise buildings, 1 1 floor, each with two house numbers; There are 10 villas with 1 house numbers respectively. The rest are all six-story multi-storey apartments. How many house numbers are there in a multi-storey apartment? It should be calculated as follows:161-3× 2-10×1=145.