题目内容
计算:
(1)8-2×(-3)2+[(-2)×3]2;
(2)
-
-(-
)+(-
).
(1)8-2×(-3)2+[(-2)×3]2;
(2)
| 2 |
| 3 |
| 3 |
| 8 |
| 1 |
| 3 |
| 1 |
| 8 |
(1)原式=8-2×9+(-6)2=8-18+36=26;
(2)原式=
-
+
-
=(
+
)+(-
-
)
=1-
=
.
(2)原式=
| 2 |
| 3 |
| 3 |
| 8 |
| 1 |
| 3 |
| 1 |
| 8 |
=(
| 2 |
| 3 |
| 1 |
| 3 |
| 3 |
| 8 |
| 1 |
| 8 |
=1-
| 1 |
| 2 |
=
| 1 |
| 2 |
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