问题
解答题
计算 (1)-3+4+7-5 (2)-24÷(-
(3)(
(4)-14-[1-(1-0.5×
|
答案
(1)-3+4+7-5,
=-8+11,
=3;
(2)-24÷(-
)+6×(-3 2
),1 3
=24×
-2,2 3
=16-2,
=14;
(3)(
-3 4
+7 6
)×(-36),11 12
=
×(-36)-3 4
×(-36)+7 6
×(-36),11 12
=-27+42-33,
=-60+42,
=-18;
(4)-14-[1-(1-0.5×
)]×6,1 3
=-1-[1-(1-
)]×6,1 6
=-1-(1-
)×6,5 6
=-1-
×6,1 6
=-1-1,
=-2.