题目内容
(1)计算:9
÷3
×
-2
(2)计算:(
+
+
)(
-
-
)
| 45 |
| 15 |
| 4 |
| 3 |
2
|
| 32 |
(2)计算:(
| 3 |
| 2 |
| 5 |
| 3 |
| 2 |
| 5 |
(1)原式=27
÷(3×
×
)×
-8
=3
×
-8
=
-8
;
(2)原式=(
)2-(
+
)2
=3-(2+2
+5)
=-4-2
.
| 5 |
| 3 |
| 5 |
8
| ||
| 9 |
| 2 |
=3
| 3 |
8
| ||
| 9 |
| 2 |
8
| ||
| 3 |
| 2 |
(2)原式=(
| 3 |
| 2 |
| 5 |
=3-(2+2
| 10 |
=-4-2
| 10 |
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