- 1999 . 19981998 + 19991999 . 1998
= - 1999 . 1998 . 10001 + 1999 . 10001 . 1998
= 10001 . 1998 ( - 1999 + 1999 )
= 10001 . 1998 . 0
= 0
=-1998(19981998-19991999)
=-1998.-1
=1998
kb vs **** cho mik nha
-1999.19981998+19991999.1998=19990000 nha bn
k mink nha
- 1999.19981998 + 19991999.1998
= ( - 1999 ) . 1998 . 10 001 + 1999 . 10 001 . 1998
= 1998 . [ ( - 1999 ) . 10 001 + 1999 . 10 001 ]
= 1998 . 0
= 0
-1999.19981998 + 19991999.1998 = 0
chúc bn học tốt!
- 1999 . 19981998 + 19991999 . 1998
= - 1999 . 199819998 + 1999 . 10001 . 1998
= - 1999 . 19981998 + 1999 . 19981998
= 19981998 ( - 1999 + 1999 )
= 19981998 . 0
= 0
