题目内容
计算
(1)(-3)2-|-
|+2-1-
(2)
-
+
(3)(
-1)2-(
-
)(
+
)
(4)
+6
-2x
.
(1)(-3)2-|-
1 |
2 |
9 |
(2)
18 |
32 |
2 |
(3)(
3 |
3 |
2 |
3 |
2 |
(4)
2 |
3 |
9x |
|
|
(1)原式=9-
+
-3=6;
(2)原式=3
-4
+
=0;
(3)原式=3-2
+1-(3-2)=4-2
-1=3-2
;
(4)原式=2
+3
-2
=3
.
1 |
2 |
1 |
2 |
(2)原式=3
2 |
2 |
2 |
(3)原式=3-2
3 |
3 |
3 |
(4)原式=2
x |
x |
x |
x |
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