题目内容
计算:36×25%+
+1÷
+2.5÷
=
1
| ||
1
|
| 2 |
| 5 |
| 3 |
| 22 |
30
| 2 |
| 3 |
30
.| 2 |
| 3 |
分析:此题含有小数、分数以及百分数,通过观察,把25%化为分数
,繁分式中的分母化为小数,把除法改为乘法,然后计算即可.
| 1 |
| 4 |
解答:解:36×25%+
+1÷
+2.5÷
,
=36×
+
+1×
+
×
,
=9+
+(1+
)×
,
=9+
+
×
,
=9+
+
,
=9+21
,
=30
.
1
| ||
1
|
| 2 |
| 5 |
| 3 |
| 22 |
=36×
| 1 |
| 4 |
| ||
| 1.75+1.25 |
| 5 |
| 2 |
| 5 |
| 2 |
| 22 |
| 3 |
=9+
| ||
| 3 |
| 22 |
| 3 |
| 5 |
| 2 |
=9+
| 5 |
| 6 |
| 25 |
| 3 |
| 5 |
| 2 |
=9+
| 5 |
| 6 |
| 125 |
| 6 |
=9+21
| 2 |
| 3 |
=30
| 2 |
| 3 |
点评:在化简中,注意小数、分数、百分数的互化,根据具体情况,灵活处理.
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