题目内容
计算题:
(1)
+
-
+
;
(2)
+6
-2x
;
(3)(4+
)(4-
);
(4)
•(-
)÷
.
(1)
45 |
18 |
8 |
125 |
(2)
2 |
3 |
9x |
|
|
(3)(4+
5 |
5 |
(4)
2 |
b |
ab |
3 |
2 |
a3b |
1 |
3 |
|
(1)原式=3
+3
-2
+5
=8
+
;
(2)原式=2
+3
-2
=3
;
(3)原式=16-5
=11;
(4)原式=
•(-
)•3•
=-
•
=-
.
5 |
2 |
2 |
5 |
=8
5 |
2 |
(2)原式=2
x |
x |
x |
=3
x |
(3)原式=16-5
=11;
(4)原式=
2 |
b |
3 |
2 |
ab•a3b•
|
=-
9 |
b |
a5b |
=-
9a2 |
b |
ab |
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