题目内容
| 7 |
| 97 |
| 3 |
| 5 |
| 5 |
| 97 |
分析:先把除法变成乘法,再根据积不变规律把加号左右的算式都变成含有因数
,然后运用乘法分配律简算.
| 5 |
| 97 |
解答:解:
÷1
+
×0.125,
=
×
+
×
,
=
×
+
×
,
=
×(
+
),
=
×1,
=
.
| 7 |
| 97 |
| 3 |
| 5 |
| 5 |
| 97 |
=
| 7 |
| 97 |
| 5 |
| 8 |
| 5 |
| 97 |
| 1 |
| 8 |
=
| 5 |
| 97 |
| 7 |
| 8 |
| 5 |
| 97 |
| 1 |
| 8 |
=
| 5 |
| 97 |
| 7 |
| 8 |
| 1 |
| 8 |
=
| 5 |
| 97 |
=
| 5 |
| 97 |
点评:乘法分配律是常用的简便运算的方法,要熟练掌握,灵活运用.
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