问题
解答题
计算: (1)-17+49-9+7; (2)(-6)2×(
(3)
(4)-7
(5)(-30)×(
|
答案
(1)原式=56-26
=30;
(2)原式=36×
-81 6
=6-8
=-2;
(3)原式=-7×60-
×6013 15
=-420-52
=-472;
(5)原式=-30×
-30×(-1 2
)-30×2 3 4 5
=-15+20-24
=-19.
计算: (1)-17+49-9+7; (2)(-6)2×(
(3)
(4)-7
(5)(-30)×(
|
(1)原式=56-26
=30;
(2)原式=36×
-81 6
=6-8
=-2;
(3)原式=-7×60-
×6013 15
=-420-52
=-472;
(5)原式=-30×
-30×(-1 2
)-30×2 3 4 5
=-15+20-24
=-19.