题目内容
用简便方法计算.
(1)36×(
-
+
)
(2)2.05-
-
.
(1)36×(
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 6 |
(2)2.05-
| 11 |
| 9 |
| 7 |
| 9 |
(1)36×(
-
+
),
=36×
-36×
+36×
,
=27-18+6,
=9+6,
=15;
(2)2.05-
-
,
=2.05-(
+
),
=2.05-2,
=0.05.
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 6 |
=36×
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 6 |
=27-18+6,
=9+6,
=15;
(2)2.05-
| 11 |
| 9 |
| 7 |
| 9 |
=2.05-(
| 11 |
| 9 |
| 7 |
| 9 |
=2.05-2,
=0.05.
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