题目内容
计算:
(1)
+
-
;(2)
+
-
;
(3)(
-2)(2+
);(4)(
-
)2;
(5)
;(6)m
÷n
×
(1)
| 24 |
| 54 |
| 96 |
| 12 |
|
|
(3)(
| 3 |
| 3 |
| 5 |
| 2 |
(5)
| ||||
|
| mn |
|
|
(1)原式=2
+3
-4
,
=
;
(2)原式=2
+
-
,
=
;
(3)原式=(
)2-4=-1;
(4)原式=(
)2-2
+(
)2=7-2
;
(5)原式=
+1=3;
(6)原式=
×
×
=
;
| 6 |
| 6 |
| 6 |
=
| 6 |
(2)原式=2
| 3 |
| ||
| 9 |
| ||
| 3 |
=
| 16 |
| 9 |
| 3 |
(3)原式=(
| 3 |
(4)原式=(
| 5 |
| 10 |
| 2 |
| 10 |
(5)原式=
| ||
|
(6)原式=
| m |
| n |
mn×
|
|
| mn |
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