题目内容
| 7 |
| 18 |
| 5 |
| 11 |
| 7 |
| 18 |
| 11 |
| 5 |
分析:观察式子可以发现,先把后面的除法变成乘法后,就可以使用乘法分配律进行简算.
解答:解:
×
+
÷
,
=
×
+
×
,
=(
+
)×
,
=
×
,
=
.
| 7 |
| 18 |
| 5 |
| 11 |
| 7 |
| 18 |
| 11 |
| 5 |
=
| 7 |
| 18 |
| 5 |
| 11 |
| 7 |
| 18 |
| 5 |
| 11 |
=(
| 7 |
| 18 |
| 7 |
| 18 |
| 5 |
| 11 |
=
| 7 |
| 9 |
| 5 |
| 11 |
=
| 35 |
| 99 |
点评:此题考查分数四则混算及运用定律进行简算.
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