题目内容
计算或化简:
(1)4
-
+
;
(2)
-
+2
-
;
(3)
(3
-
);
(4)3
÷(3
-2
).
(1)4
| 3 |
| 12 |
| 18 |
(2)
| 45 |
| 1 | ||
|
| 20 |
| ||
|
(3)
| 10 |
|
|
(4)3
| 12 |
|
| 3 |
(1)原式=4
-2
+3
=2
+3
;
(2)原式=3
-
+4
-2
=
;
(3)原式=
(
-
)=6-5=1;
(4)原式=6
÷(
-2
)=-2
.
| 3 |
| 3 |
| 2 |
| 3 |
| 2 |
(2)原式=3
| 5 |
| ||
| 5 |
| 5 |
| 5 |
24
| ||
| 5 |
(3)原式=
| 10 |
3
| ||
| 5 |
| ||
| 2 |
(4)原式=6
| 2 |
| 3 |
| 3 |
| 6 |
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