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