1998+1998x2+1998x4+1998x3
=1998x1+1998x2+1998x4+1998x3
=1998x(1+2+4+3)
=1998x10
=19980
1998+1998x2+1998x4+1998x3
= 1998 x ( 1 + 2 + 3 + 4 )
= 1998 x 10
= 19980
1998+1998x2+1998x4+1998x3
= 1998x1 + 1998x2 + 1998x3 + 1998x4
= 1998 (1+2+3+4)
= 1998 x 10
= 19980
= 1998 x 1 + 1998 x 2 + 1998 x 4 + 1998 x 3
= 1998 x ( 1+2+3+4 )
= 1998 x 10
19980
1998+1998x2+1998x4+1998x3
= 1998x1 + 1998x2 + 1998x3 + 1998x4
= 1998 (1+2+3+4)
= 1998 x 10
= 19980
1998+1998x2+1998x4+1998x3
= 1998 x (1 + 2 + 3 + 4)
= 1998 x 10
=19980
1998.(1+2+3+4)=1998.10=19980 dấu chấm là dấu nhân
1998+1998.2+1998.4+1998.3
=1998.(1+2+4+3)
=1998.10
=19980
tớ đảm bảo đúng luôn ( chú ý dấu'' . '' là dấu '' + '' nhé )
1998 + 1998 x 2 +1998 x 4 + 1998 x 3
= 1998 x ( 2 + 4 + 3 )
= 1998 x 9
= 17982