222*333+111+334,怎样简便? 99*97+9.9*30 ,怎样简便?
问题描述:
222*333+111+334,怎样简便? 99*97+9.9*30 ,怎样简便?
答
222*333+111*334
=111*666+111*334
=111*(666+334)
=111*1000
=111000
99*97+9.9*30
=99*97+99*3
=99*(97+3)
=99*100
=9900