问题
解答题
计算: (1)23-18-(-7)+(-12) (2)22-5×
|
答案
(1)23-18-(-7)+(-12),
=23-18+7-12,
=0;
(2)22-5×
+|-2|,1 5
=4-1+2,
=5.
计算: (1)23-18-(-7)+(-12) (2)22-5×
|
(1)23-18-(-7)+(-12),
=23-18+7-12,
=0;
(2)22-5×
+|-2|,1 5
=4-1+2,
=5.