题目内容
(1)
-5
+6
;
(2)(5
-6
+4
)÷
;
(3)
+
-(
-1)0;
(4)
-(3
-2
)(3
+2
).
| 32 |
|
|
(2)(5
| 48 |
| 27 |
| 15 |
| 3 |
(3)
| 2 | ||
|
| 27 |
| 3 |
(4)
| ||
|
| 2 |
| 3 |
| 2 |
| 3 |
(1)原式=4
-
+
=4
-
=3
;
(2)原式=(20
-18
+4
)÷
=(2
+4
)÷
=2+4
;
(3)原式=
+1+3
-1
=4
;
(4)原式=
-(18-12)
=2+
-6
=-4+
.
| 2 |
5
| ||
| 2 |
3
| ||
| 2 |
=4
| 2 |
| 2 |
=3
| 2 |
(2)原式=(20
| 3 |
| 3 |
| 15 |
| 3 |
=(2
| 3 |
| 15 |
| 3 |
=2+4
| 5 |
(3)原式=
| 3 |
| 3 |
=4
| 3 |
(4)原式=
4+2
| ||
| 2 |
=2+
| 3 |
=-4+
| 3 |
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