`Đáp` `án` :
`a`) ${0}$
`b`) ${0}$
`c`) ${0}$
`Giải` `thích` `các` `bước` `giải` :
a) ${20152015}$ . ${2014}$ - ${20142014}$ . ${2015}$
= ${10001}$ . ${2015}$ . ${2014}$ - ${10001}$ . ${2014}$ . ${2015}$
= ${0}$
b) ${123}$ . ${456456}$ - ${456}$ . ${123123}$
= ${123}$ . ${1001}$ . ${456}$ - ${456}$ . ${1001}$ . ${123}$
= ${0}$
c) ( ${98}$ . ${7676}$ - ${9898}$ . ${76}$ ) : ( ${2001}$ . ${2002}$ . ${2003}$.......${2010}$ )
= ( ${98}$ . ${101}$ . ${76}$ - ${101}$ . ${98}$ . ${76}$ ) : ( ${2001}$ . ${2002}$ . ${2003}$.......${2010}$ )
= ${0}$ : ( ${2001}$ . ${2002}$ . ${2003}$.......${2010}$ )
= ${0}$
@`Dịu` `gửi` `bạn`
`Chúc` `bạn` `học` `tốt` !
