题目内容
计算
(1)3
+
-2
-3
(2)(
+
)(
-
)
(3)(
)-1+|-3|+(2-
)0+(-1).
(1)3
| 2 |
| 3 |
| 2 |
| 3 |
(2)(
| 3 |
| 2 |
| 3 |
| 2 |
(3)(
| 1 |
| 2 |
| 3 |
(1)原式=(3
-2
)+(
-3
)
=
-2
;
(2)原式=(
)2-(
)2
=3-2
=1;
(3)原式=2+3+1-1
=5.
| 2 |
| 2 |
| 3 |
| 3 |
=
| 2 |
| 3 |
(2)原式=(
| 3 |
| 2 |
=3-2
=1;
(3)原式=2+3+1-1
=5.
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