(1)-2-5+19-13+1,
=-7+19-12,
=0;
(2)
×(?1 2
)×5 6
÷13 11
,1 4
=-
×1 2
×5 6
×3 11
,4 5
=-
;1 11
(3)17-8÷(-2)+4×(-3),
=17+4-12,
=9;
(4)(-
+1 6
-3 4
)×48,1 12
=
×48,1 2
=24;
(5)(?2)2?|?7|?2×(?
),1 2
=4-7+1,
=-2;
(6)?
×[(?4 5
)÷(0.75?1)+(?2)5],1 2
=-
×(2-32),4 5
=24.