题目内容
计算:
①
+(
-1)0-
;
②(
-2
)(
+2
);
③
-
+
;
④2
(4
-3
+2
);
⑤
•(-4
)÷
.
①
| 27 |
| 5 |
| 12 |
②(
| 2 |
| 3 |
| 2 |
| 3 |
③
| 18 |
| 2 | ||
|
| 3 |
④2
| 5 |
| 20 |
| 45 |
| 5 |
⑤
| 1 |
| 3 |
-
|
-
|
| 1 |
| 6 |
|
(1)原式=
+1-
=3
-2
+1=
+1;
(2)原式=(
)2-(2
)2=2-12=-10;
(3)原式=3
-
+
=2
+
;
(4)原式=2
(8
-9
+2
)=2
×
=10;
(5)原式=-
×4y
÷
=-8x2y.
| 27 |
| 12 |
| 3 |
| 3 |
| 3 |
(2)原式=(
| 2 |
| 3 |
(3)原式=3
| 2 |
| 2 |
| 3 |
| 2 |
| 3 |
(4)原式=2
| 5 |
| 5 |
| 5 |
| 5 |
| 5 |
| 5 |
(5)原式=-
| x |
| 3 |
-
|
|
| 1 |
| 6x |
|
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