问题
填空题
计算:436×435435436-435×436436435=______.
答案
436×435435436-435×436436435,
=436×435435436-(436-1)×436436435,
=436×435435436-436×436436435+436436435,
=436×(435435436-436436435)+436436435,
=436×(-1000999)+436436435,
=436436435-436435564,
=871.
故答案为:871.