题目内容
计算下列各题(每小题5分,共10分)
(1)-
+
-|
-2|;
(2)2
+
-10
(结果保留2位有效数字).
(1)-
| 3 | 8 |
| 16 |
| 3 |
(2)2
| 3 |
| ||
| 2 |
| 0.04 |
(1)原式=-2+4-2+
=
;
(2)原式=2
+
-2≈2×1.732+2.236÷2-2≈2.6.
| 3 |
| 3 |
(2)原式=2
| 3 |
| ||
| 2 |
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题目内容
| 3 | 8 |
| 16 |
| 3 |
| 3 |
| ||
| 2 |
| 0.04 |
| 3 |
| 3 |
| 3 |
| ||
| 2 |