题目内容
计算:
①
×
②
-
③
+
.
①
| 3 | 8 |
| 3 | -
| ||
②
| 3 | 343 |
| 3 | -0.125 |
③
| 3 | -3
| ||
| 3 | 1-
| ||
①原式=2×(-
)
=-
;
②原式=7-(-0.5)
=7.5;
③原式=-
+
=-1.
| 1 |
| 4 |
=-
| 1 |
| 2 |
②原式=7-(-0.5)
=7.5;
③原式=-
| 3 |
| 2 |
| 1 |
| 2 |
=-1.
练习册系列答案
相关题目