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trả lời :
5550
đúng k bạn
chúc bn học tốt
111 + 999 + 888 + 222 + 777 + 333 + 666 + 444 + 555 + 555
= ( 111 + 999 ) + ( 888 + 222 ) + ( 777 + 333 ) + ( 666 + 444 ) + ( 555 + 555 )
= 1110 + 1110 + 1110 + 1110 + 1110
= 1110 x 5
= 5550.
111 + 999 + 888 + 222 + 777 + 333 + 666 + 444 + 555 + 555
= ( 111 + 999 ) + ( 888 + 222 ) + ( 777 + 333 ) + ( 666 + 444 ) + ( 555 + 555 )
= 1110 + 1110 + 1110 + 1110 + 1110
= 1110 x 5
= 5550
~~~~~~~~~HOK TỐT ~~~~~~~~~~
111+999+888+222+777+333+666+444+555+555
=(111+999)+(888+222)+(777+333)+(666+444)+(555+555)
=1110+1110+1110+1110+1110
=1110X5
=5550
ủng hộ nha
