题目内容
用简便方法计算.(必须写出主要过程)
(
-
+
)×241.1-
-
-
.
(
| 2 |
| 3 |
| 1 |
| 2 |
| 3 |
| 8 |
| 4 |
| 11 |
| 2 |
| 11 |
| 5 |
| 11 |
(1)(
-
+
)×24,
=
×24-
×24+
×24,
=16-12+9,
=13;
(2)1.1-
-
-
,
=1.1-(
+
+
),
=1.1-1,
=0.1.
| 2 |
| 3 |
| 1 |
| 2 |
| 3 |
| 8 |
=
| 2 |
| 3 |
| 1 |
| 2 |
| 3 |
| 8 |
=16-12+9,
=13;
(2)1.1-
| 4 |
| 11 |
| 2 |
| 11 |
| 5 |
| 11 |
=1.1-(
| 4 |
| 11 |
| 2 |
| 11 |
| 5 |
| 11 |
=1.1-1,
=0.1.
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