题目内容
计算:
(1)23-18-(-7)+(-12)
(2)22-5×
+|-2|.
(1)23-18-(-7)+(-12)
(2)22-5×
| 1 |
| 5 |
(1)23-18-(-7)+(-12),
=23-18+7-12,
=0;
(2)22-5×
+|-2|,
=4-1+2,
=5.
=23-18+7-12,
=0;
(2)22-5×
| 1 |
| 5 |
=4-1+2,
=5.
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