题目内容
计算:
(1)(-2)2-|-8|+3-2×(-
);
(2)(-
+
-
)×|-24|.
(1)(-2)2-|-8|+3-2×(-
| 1 |
| 2 |
(2)(-
| 1 |
| 2 |
| 2 |
| 3 |
| 1 |
| 4 |
(1)(-2)2-|-8|+3-2×(-
)
=4-8+3+1
=8-8
=0;
(2)(-
+
-
)×|-24|
=(-
+
-
)×24
=(-
)×24+
×24-
×24
=-12+16-6
=-18+16
=-2.
| 1 |
| 2 |
=4-8+3+1
=8-8
=0;
(2)(-
| 1 |
| 2 |
| 2 |
| 3 |
| 1 |
| 4 |
=(-
| 1 |
| 2 |
| 2 |
| 3 |
| 1 |
| 4 |
=(-
| 1 |
| 2 |
| 2 |
| 3 |
| 1 |
| 4 |
=-12+16-6
=-18+16
=-2.
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