题目内容
计算:
(1)180°-(34°55′+21°33′)
(2)(-1.5)×3×(-
)2-(-
)×(-1.5)2.
(1)180°-(34°55′+21°33′)
(2)(-1.5)×3×(-
| 2 |
| 3 |
| 1 |
| 3 |
(1)原式=180°-56°28′=123°32′.
(2)原式=-
×3×
+
×
=-2+
=-
.
(2)原式=-
| 3 |
| 2 |
| 4 |
| 9 |
| 1 |
| 3 |
| 9 |
| 4 |
| 3 |
| 4 |
| 5 |
| 4 |
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