题目内容
计算
(1)-14-2×(-3)2+|-4|
(2)(-
-
+
)÷
(3)2(2b-3a)+3(2a-3b)
(4)180°-56°23′.
(1)-14-2×(-3)2+|-4|
(2)(-
| 3 |
| 4 |
| 5 |
| 9 |
| 7 |
| 12 |
| 1 |
| 36 |
(3)2(2b-3a)+3(2a-3b)
(4)180°-56°23′.
(1)原式=-1-2×9+4
=-1-18+4
=-19+4
=-15;
(2)原式=-
×36-
×36+
×36
=-27-20+21
=-47+21
=-26;
(3)原式=4b-6a+6a-9b
=4b-9b-6a+6a
=-5b;
(4)原式=179°60′-56°23′
=123°37′.
=-1-18+4
=-19+4
=-15;
(2)原式=-
| 3 |
| 4 |
| 5 |
| 9 |
| 7 |
| 12 |
=-27-20+21
=-47+21
=-26;
(3)原式=4b-6a+6a-9b
=4b-9b-6a+6a
=-5b;
(4)原式=179°60′-56°23′
=123°37′.
练习册系列答案
相关题目