题目内容
计算:
(1)(
+
)-(
-
);
(2)2
×
÷5
.
(1)(
| 48 |
| 20 |
| 12 |
| 5 |
(2)2
| 12 |
| ||
| 4 |
| 2 |
(1)原式=4
+2
-2
+
=2
+3
;
(2)原式=(2×
)
×
=3×
=
.
| 3 |
| 5 |
| 3 |
| 5 |
=2
| 3 |
| 5 |
(2)原式=(2×
| 1 |
| 4 |
| 36 |
| 1 | ||
5
|
=3×
| ||
| 10 |
| 3 |
| 10 |
| 2 |
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