问题
填空题
计算:20042-2003×2005=______,999×1001=______.
答案
20042-2003×2005
=20042-×(2004+1)
=20042-(20042-1)
=1;
999×1001
=×(1000+1)
=10002-12
=1000000-1
=999999.
故答案为:1,999999.
计算:20042-2003×2005=______,999×1001=______.
20042-2003×2005
=20042-×(2004+1)
=20042-(20042-1)
=1;
999×1001
=×(1000+1)
=10002-12
=1000000-1
=999999.
故答案为:1,999999.