题目内容
简便计算.
2-
|
|
分析:(1)先算除法,再运用减法的运算定律进行简算,
(2)把除以
化成乘以6,再运用乘法的分配律进行简算.
(2)把除以
| 1 |
| 6 |
解答:解:(1)2-
÷
-
,
=2-
-
,
=2-(
+
),
=2-2,
=0;
(2)
×6+
÷
+
×6,
=
×6+
×6+
×6,
=(
+
+
)×6,
=1×6,
=6.
| 6 |
| 13 |
| 9 |
| 26 |
| 2 |
| 3 |
=2-
| 4 |
| 3 |
| 2 |
| 3 |
=2-(
| 4 |
| 3 |
| 2 |
| 3 |
=2-2,
=0;
(2)
| 5 |
| 9 |
| 1 |
| 3 |
| 1 |
| 6 |
| 1 |
| 9 |
=
| 5 |
| 9 |
| 1 |
| 3 |
| 1 |
| 9 |
=(
| 5 |
| 9 |
| 1 |
| 3 |
| 1 |
| 9 |
=1×6,
=6.
点评:考查了分数四则混合运算的顺序,灵活运用运算定律进行简算.
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