搜搜做题作业网巧算9999*5556+6666*6666
来源：学生作业帮 编辑：搜搜做题作业网作业帮 分类：数学作业 时间：2024/07/02 00:05:52
巧算9999*5556+6666*6666
9999*5556+6666*6666
=9999*(5555+1)+36*1111^2
=9999*5555+9999+36*1111^2
=45*1111^2+9999+36*1111^2
=(45+36)*1111^2+9999
=81*1111^2+9*1111
=(9*1111)^2+9*1111
=9*1111*(9999+1)
=9999*10000
=99990000.
=9999*(5555+1)+36*1111^2
=9999*5555+9999+36*1111^2
=45*1111^2+9999+36*1111^2
=(45+36)*1111^2+9999
=81*1111^2+9*1111
=(9*1111)^2+9*1111
=9*1111*(9999+1)
=9999*10000
=99990000.