998乘以1002-998乘以1001
问题描述：
998乘以1002-998乘以1001
答
998乘以1002-998乘以1001
=998×(1002-1001)
=998×1
=998题目错了，正确的是：998乘以1002-999乘以1001解: 998×1002-999×1001 =(1000-2)×(1000+2)-(1000-1)×(1000+1) =1000²-4-(1000²-1) =1000²-4-1000²+1 =-3祝你开心