问题
解答题
计算: (1)-24×(
(2)(-3)2÷
|
答案
(1)解法一:原式=-24×
+(-24)×1 2
-(-24)×2 3
,5 6
=-12-16+20,
=-8.
解法二:原式=-24×
,1 3
=-8.
(2)原式=9×
+(-1),2 9
=2-1,
=1.
计算: (1)-24×(
(2)(-3)2÷
|
(1)解法一:原式=-24×
+(-24)×1 2
-(-24)×2 3
,5 6
=-12-16+20,
=-8.
解法二:原式=-24×
,1 3
=-8.
(2)原式=9×
+(-1),2 9
=2-1,
=1.