题目内容
计算:(1)
+
-4
(2)(5
-6
+4
)÷
(3)(6
-2x
)÷3
(4)
+(
+1)-1+(-2)-2
| 2 | ||
|
| 18 |
|
(2)(5
| 48 |
| 27 |
| 15 |
| 3 |
(3)(6
|
|
| x |
(4)
| 18 |
| 2 |
(1)原式=2(
+1)+3
-2
=3
+2;
(2)原式=(20
-18
+4
)÷
,
=20-18+4
,
=2+4
;
(3)原式=(3
-2
)÷3
,
=
÷3
,
=
;
(4)原式=3
+
-1+
=4
-
.
| 2 |
| 2 |
| 2 |
| 2 |
(2)原式=(20
| 3 |
| 3 |
| 15 |
| 3 |
=20-18+4
| 5 |
=2+4
| 5 |
(3)原式=(3
| x |
| x |
| x |
=
| x |
| x |
=
| 1 |
| 3 |
(4)原式=3
| 2 |
| 2 |
| 1 |
| 4 |
| 2 |
| 3 |
| 4 |
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