题目内容
| 2 |
| 9 |
| 3 |
| 4 |
| 7 |
| 9 |
分析:在分数、小数、百分数混合运算可将小数化成分数,百分数也化成分数,然后乘法分配律简算即可.
解答:解:
×
+0?75+
×75%
=
×
+
+
×
=(
+
)×
+
=1×
+
=
=1
| 2 |
| 9 |
| 3 |
| 4 |
| 7 |
| 9 |
=
| 2 |
| 9 |
| 3 |
| 4 |
| 3 |
| 4 |
| 7 |
| 9 |
| 3 |
| 4 |
=(
| 2 |
| 9 |
| 7 |
| 9 |
| 3 |
| 4 |
| 3 |
| 4 |
=1×
| 3 |
| 4 |
| 3 |
| 4 |
=
| 6 |
| 4 |
| 1 |
| 2 |
点评:此题考查的目的是分数、小数、百分数的互化,乘法分配律在分数混合运算中的应用.
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