题目内容
计算:
(1)(
+2)(3
-5
);
(2)
×
÷(-
).
(1)(
| 10 |
| 15 |
| 6 |
(2)
| 15 |
| 3 |
| 5 |
| 20 |
| 1 |
| 3 |
| 6 |
(1)原式=3
-5
+6
-10
=15
-10
+6
-10
=5
-4
;
(2)原式=
÷(-
)
=6
÷(-
)
=-9
.
| 150 |
| 60 |
| 15 |
| 6 |
=15
| 6 |
| 15 |
| 15 |
| 6 |
=5
| 6 |
| 15 |
(2)原式=
| 3 |
| 5 |
| 300 |
| 1 |
| 3 |
| 6 |
=6
| 3 |
| 1 |
| 3 |
| 6 |
=-9
| 2 |
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