题目内容
计算与化简:
(1)(
+
);
(2)(3
-2
-
)÷2
;
(3)(
-2)0+(2-
)-1-
×
;
(4)
•
÷
.
(1)(
| 48 |
| 1 |
| 4 |
| 12 |
(2)(3
| 12 |
|
| 48 |
| 3 |
(3)(
| 3 |
| 3 |
| 12 |
|
(4)
| 12xy |
|
| y |
(1)原式=4
+
×2
=4
+
=
3;
(2)原式=(6
-
-4
)÷2
=
÷2
=
;
(3)原式=1+
-2
×
=1+2+
-2=1+
;
(4)原式=2
•
×
=3x
.
| 3 |
| 1 |
| 4 |
| 3 |
| 3 |
| 1 |
| 2 |
| 3 |
| 9 |
| 2 |
(2)原式=(6
| 3 |
| 2 |
| 3 |
| 3 |
| 3 |
| 3 |
| 4 |
| 3 |
| 3 |
| 3 |
| 2 |
| 3 |
(3)原式=1+
| 1 | ||
2-
|
| 3 |
| ||
| 3 |
| 3 |
| 3 |
(4)原式=2
| 3xy |
| 3x |
| 2 |
| 1 | ||
|
| 3x |
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