116 - 115 + 114
= 114 . 112 - 114 . 11 + 114 . 1
= 114 . 121 - 114 . 11 + 114 . 1
= 114 . ( 121 - 11 + 1 )
= 114 . 111
Ta thấy : 111 \(⋮\)111
\(\Rightarrow\)114 . 111 \(⋮\)111 hay 116 - 115 + 114 \(⋮\)111
nhanh nha 3 h mik cần r
116−115+114116−115+114
=114.112−114.11+114.1=114.112−114.11+114.1
=114.121−114.11+114.1=114.121−114.11+114.1
=114(121−11+1)=114(121−11+1)
=114.111⋮111→đpcm
xin tiick
116 - 115 + 114
= 114.112 - 114.11 + 114
= 114.( 112 - 11 + 1 )
= 114.( 121 - 11 + 1 )
= 114.111
--> 116 - 115 + 114 chia hết cho 111.
Học tốt nhaa~~