题目内容
计算
(1)
-
-
(2)
×
÷(-
).
(1)
| 27 |
| 1 |
| 3 |
| 18 |
| 12 |
(2)
| 15 |
| 3 |
| 5 |
| 20 |
| 1 |
| 3 |
| 6 |
(1)原式=3
-
-2
=
-
;
(2)原式=
×(-3)
=-
×5
=-9
.
| 3 |
| 2 |
| 3 |
| 3 |
| 2 |
(2)原式=
| 3 |
| 5 |
15×20×
|
| 9 |
| 5 |
| 2 |
| 2 |
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题目内容
| 27 |
| 1 |
| 3 |
| 18 |
| 12 |
| 15 |
| 3 |
| 5 |
| 20 |
| 1 |
| 3 |
| 6 |
| 3 |
| 2 |
| 3 |
| 3 |
| 2 |
| 3 |
| 5 |
15×20×
|
| 9 |
| 5 |
| 2 |
| 2 |