99999×77778+33333×66666=_.
问题描述:
99999×77778+33333×66666=______.
答
99999×77778+33333×66666,
=99999×77778+33333×(3×22222),
=99999×77778+(33333×3)×22222,
=99999×77778+99999×22222,
=99999×(77778+22222),
=99999×100000,
=9999900000;
故答案为:9999900000.