题目内容
计算:
(1)
×(
-
)
(2)(20
-8
+2
)÷
(3)(6
-2x
)÷3
(4)(8
-3
)÷2
-(
-1)2.
(1)
| 5 |
| 10 |
| 5 |
(2)(20
| 48 |
| 27 |
| 12 |
| 6 |
(3)(6
|
|
| x |
(4)(8
| 2 |
| 6 |
| 2 |
| 3 |
(1)原式=
×
-
×
=5
-5;
(2)原式=(80
-24
+4
)÷
=60
÷
=30
;
(3)原式=(3
-2
)÷3
=
÷3
=
;
(4)原式=8
÷2
-3
÷2
-(3-2
+1)
=4-
-4+2
=
.
| 5 |
| 10 |
| 5 |
| 5 |
=5
| 2 |
(2)原式=(80
| 3 |
| 3 |
| 3 |
| 6 |
=60
| 3 |
| 6 |
=30
| 2 |
(3)原式=(3
| x |
| x |
| x |
=
| x |
| x |
=
| 1 |
| 3 |
(4)原式=8
| 2 |
| 2 |
| 6 |
| 2 |
| 3 |
=4-
3
| ||
| 2 |
| 3 |
=
| ||
| 2 |
练习册系列答案
相关题目