题目内容
计算题
(1)
-6
+
(2)
×
+
÷
-
(3)(
+
)(
-
)-(
-
)2.
(1)
| 27 |
|
| 48 |
(2)
| 6 |
| 3 |
| 18 |
| 9 |
|
(3)(
| 2 |
| 6 |
| 2 |
| 6 |
| 2 |
| 1 | ||
|
(1)原式=3
-2
+4
=5
;
(2)原式=3
+3
÷3-
=3
+
-
=
;
(3)原式=(
)2-(
)2-(2-2+
)
=2-6-
=-
.
| 3 |
| 3 |
| 3 |
| 3 |
(2)原式=3
| 2 |
| 2 |
| ||
| 2 |
| 2 |
| 2 |
| ||
| 2 |
7
| ||
| 2 |
(3)原式=(
| 2 |
| 6 |
| 1 |
| 2 |
=2-6-
| 1 |
| 2 |
=-
| 9 |
| 2 |
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