题目内容
计算:
(1)-
•
;
(2)
÷
×
;
(3)
-
÷2+(3-
)(1+
);
(4)(
)-1-20120+|-2
|-
.
(1)-
| 3 |
| (-16)(-36) |
(2)
1
|
2
|
1
|
(3)
| 48 |
| 54 |
| 3 |
| 1 | ||
|
(4)(
| 1 |
| 6 |
| 5 |
| 20 |
(1)原式=-
•
=-
×
×
=-
×4×6=-24
;
(2)原式=
÷
×
=
=1;
(3)原式=4
-3
×
+(3-
)×(1+
)=4
-
+(3-
)×
=4
-
+
;
(4)原式=6-1+2
-2
=5.
| 3 |
| 16×36 |
| 3 |
| 16 |
| 36 |
| 3 |
| 3 |
(2)原式=
|
|
|
|
(3)原式=4
| 3 |
| 6 |
| 1 |
| 2 |
| 3 |
| ||
| 3 |
| 3 |
3
| ||
| 2 |
| 3 |
3+
| ||
| 3 |
| 3 |
3
| ||
| 2 |
| 1 |
| 2 |
(4)原式=6-1+2
| 5 |
| 5 |
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