题目内容
计算:
(1)4
-
(2)
-
(3)(5+
)(5
-2
)
(4)(
-
)÷
(1)4
|
| 50 |
(2)
| 3 | ||
|
| 1 | ||||
|
(3)(5+
| 10 |
| 2 |
| 5 |
(4)(
|
| 60 |
| ||
| 5 |
(1)原式=2
-5
=-3
;
(2)原式=
-(
-
)
=
-
+
=
;
(3)原式=25
+10
-10
-10
=15
;
(4)原式=(
-2
)×
=
-10
=-9
.
| 2 |
| 2 |
=-3
| 2 |
(2)原式=
| 3 |
| 3 |
| 2 |
=
| 3 |
| 3 |
| 2 |
| 2 |
(3)原式=25
| 2 |
| 5 |
| 5 |
| 2 |
=15
| 2 |
(4)原式=(
| ||
| 5 |
| 15 |
| 5 |
=
| 3 |
| 3 |
| 3 |
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