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计算512×50-492×50=.

题目详情
计算512×50-492×50=______.22
▼优质解答
答案和解析
5122×50-4922×50
=(50+1)22×50-(50-1)22×50
=50[(50+1)22-(50-1)22]
=50[(50+1+50-1)(50+1-50+1)]
=50(100×2)
=10000;
故答案为:10000.