题目内容
计算:
(1)(
+
)(
-
)-(-
)2;
(2)
÷
-2
×
+
.
(1)(
5 |
2 |
5 |
2 |
3 |
(2)
48 |
3 |
|
12 |
24 |
(1)原式=(
)2-(
)2-3
=5-2-3
=0;
(2)原式=
-2
+2
=4-2
+2
=4.
5 |
2 |
=5-2-3
=0;
(2)原式=
48÷3 |
|
6 |
=4-2
6 |
6 |
=4.
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