问题
解答题
计算: (1)(-3)+(-4)-(+11)-(-9); (2)-
(3)-6÷(-0.25)×
(4)[-32×(-
|
答案
(1)原式=(-3)+(-4)+(-11)+(+9),
=-18+9,
=-9;
(2)原式=-
-(-5 6
)+(-4 6
),8 6
=-
+(+5 6
)+(-4 6
),8 6
=-
;3 2
(3)原式=-6×(-4)×
×11 24
,1 2
=24×
×11 24
,1 2
=
;11 2
(4)原式=[-9×
-1 9
]×4 5
÷(-9 2
),21 4
=-
×9 5
×(-9 2
),4 21
=
.54 35