题目内容
(1)
×
-5
(2)
(3)3
-
+
(4)(3+2
)(3-2
)-(
-1)2.
| 27 |
| 3 |
(2)
| ||||
|
(3)3
| 20 |
| 45 |
|
(4)(3+2
| 2 |
| 2 |
| 3 |
(1)原式=
-5=8-5=3;
(2)原式=
=
=3;
(3)原式=6
-3
+
=
;
(4)原式=32-(2
)2-(3-2
+1)
=9-8-3+2
-1
=2
-3.
| 27×3 |
(2)原式=
| ||||
|
3
| ||
|
(3)原式=6
| 5 |
| 5 |
| ||
| 5 |
16
| ||
| 5 |
(4)原式=32-(2
| 2 |
| 3 |
=9-8-3+2
| 3 |
=2
| 3 |
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