题目内容
能简算的要简算.
|
|
|
|
分析:①②运用乘法的分配律进行计算即可.③④根据四则混合运算的运算顺序计算即可.
解答:解:①
×0.25+
÷4×
,
=
×0.25+
÷4×
,
=
×0.25+
×
,
=
×(
+
),
=
×
,
=
;
②
×0.375-
×
,
=
×
-
×
,
=
×(
-
),
=
;
③
-
÷
-
,
=
-
×
-
,
=
-
-
,
=
-(
+
),
=
;
④
×[
÷(
-
)],
=
×[
÷
],
=
×
,
=1
;
| 1 |
| 9 |
| 8 |
| 9 |
| 1 |
| 4 |
=
| 1 |
| 9 |
| 8 |
| 9 |
| 1 |
| 4 |
=
| 1 |
| 9 |
| 2 |
| 9 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 1 |
| 9 |
| 2 |
| 9 |
=
| 1 |
| 4 |
| 1 |
| 3 |
=
| 1 |
| 12 |
②
| 11 |
| 7 |
| 4 |
| 7 |
| 3 |
| 8 |
=
| 11 |
| 7 |
| 3 |
| 8 |
| 4 |
| 7 |
| 3 |
| 8 |
=
| 3 |
| 8 |
| 11 |
| 7 |
| 4 |
| 7 |
=
| 3 |
| 8 |
③
| 7 |
| 4 |
| 5 |
| 6 |
| 5 |
| 4 |
| 1 |
| 3 |
=
| 7 |
| 4 |
| 5 |
| 6 |
| 4 |
| 5 |
| 1 |
| 3 |
=
| 7 |
| 4 |
| 2 |
| 3 |
| 1 |
| 3 |
=
| 7 |
| 4 |
| 2 |
| 3 |
| 1 |
| 3 |
=
| 3 |
| 4 |
④
| 9 |
| 10 |
| 3 |
| 8 |
| 3 |
| 4 |
| 1 |
| 2 |
=
| 9 |
| 10 |
| 3 |
| 8 |
| 1 |
| 4 |
=
| 9 |
| 10 |
| 3 |
| 2 |
=1
| 7 |
| 20 |
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.
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