题目内容
计算(
+
)×
÷
=
.
| 1 |
| 2 |
| 1 |
| 3 |
| 3 |
| 4 |
| 1 |
| 4 |
| 5 |
| 2 |
| 5 |
| 2 |
分析:先计算出括号里面的加法,然后把除法转化成乘法,再运用乘法结合律简算.
解答:解:(
+
)×
÷
,
=
×
×4,
=
×(
×4),
=
×3,
=
;
故答案为:
.
| 1 |
| 2 |
| 1 |
| 3 |
| 3 |
| 4 |
| 1 |
| 4 |
=
| 5 |
| 6 |
| 3 |
| 4 |
=
| 5 |
| 6 |
| 3 |
| 4 |
=
| 5 |
| 6 |
=
| 5 |
| 2 |
故答案为:
| 5 |
| 2 |
点评:运算定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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