计算(写出主要过程) 99999×99999+199999.
问题描述:
计算(写出主要过程)
99999×99999+199999.
答
99999×99999+199999,
=99999×99999+99999+100000,
=99999×(99999+1)+100000,
=99999×100000+100000,
=100000×(99999+1),
=100000×100000,
=10000000000.