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987654321×1235-987654322×1234.

题目详情
987654321×1235-987654322×1234.
▼优质解答
答案和解析
987654321×1235-987654322×1234
=987654321×(1234+1)-(987654321+1)×1234
=987654321×1234+987654321-987654321×1234-1234
=987654321-1234
=987653087.