题目内容
化简下列各题:
(1)
;
(2)
;
(3)(-
)×(-
);
(4)6
-3
;
(5)
-
;
(6)
×(-
)×
.
(1)
| 252-242 |
(2)
(-4)×
|
(3)(-
| 7 |
| 4 |
| 24 |
| 2 |
| 7 |
| 6 |
(4)6
| 3x2y3 |
|
(5)
| 10x |
| 10-1xy |
(6)
|
2
|
| 56 |
(1)原式=
=
=7;
(2)原式=
=
×
×
=2×
×13
=
;
(3)原式=
=6;
(4)原式=18
=108x3y;
(5)原式=
=x
;
(6)原式=-
=-4
.
| (25+24)×(25-24) |
=
| 49 |
=7;
(2)原式=
4×
|
=
| 4 |
|
| 169 |
=2×
| 5 |
| 3 |
=
| 130 |
| 3 |
(3)原式=
| 1 |
| 2 |
| 24×6 |
=6;
(4)原式=18
| 36x6y2 |
=108x3y;
(5)原式=
| x2y |
=x
| y |
(6)原式=-
|
=-4
| 7 |
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