题目内容
计算下列各题,能简算得要简算.
36×(
|
| ||||||||||||||
[1-(
|
|
分析:(1)(2)(4)运用乘法分配律解答,
(3)按照先算小括号里面的加法,再算中括号里面的减,最后算除法的顺序解答.
(3)按照先算小括号里面的加法,再算中括号里面的减,最后算除法的顺序解答.
解答:解:(1)36×(
+
+
),
=36×
+36×
+36×
,
=12+6+4,
=18+4,
=22;
(2)
×
+
÷1
,
=(
+
)×
,
=1×
,
=
;
(3)[1-(
+
)]÷
,
=[1-
]÷
,
=
÷
,,
=1
;
(4)
×25,
=
×(26-1),
=
×26-
×1,
=5-
,
=4
.
| 1 |
| 3 |
| 1 |
| 6 |
| 1 |
| 9 |
=36×
| 1 |
| 3 |
| 1 |
| 6 |
| 1 |
| 9 |
=12+6+4,
=18+4,
=22;
(2)
| 3 |
| 5 |
| 9 |
| 10 |
| 2 |
| 5 |
| 1 |
| 9 |
=(
| 3 |
| 5 |
| 2 |
| 5 |
| 9 |
| 10 |
=1×
| 9 |
| 10 |
=
| 9 |
| 10 |
(3)[1-(
| 1 |
| 4 |
| 3 |
| 8 |
| 1 |
| 4 |
=[1-
| 5 |
| 8 |
| 1 |
| 4 |
=
| 3 |
| 8 |
| 1 |
| 4 |
=1
| 1 |
| 2 |
(4)
| 5 |
| 26 |
=
| 5 |
| 26 |
=
| 5 |
| 26 |
| 5 |
| 26 |
=5-
| 5 |
| 26 |
=4
| 21 |
| 26 |
点评:完成本题要注意分析式中数据,运用合适的简便方法计算,注意计算结果的准确性.
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