题目内容
(135+
+
)÷(
+
).
| 2 |
| 7 |
| 3 |
| 5 |
| 2 |
| 7 |
| 3 |
| 5 |
分析:通过观察,此题可运用除法的性质简算.
解答:解:(135+
+
)÷(
+
),
=135÷(
+
)+(
+
)÷(
+
),
=135÷
+1,
=135×
+1,
=175+1,
=176.
| 2 |
| 7 |
| 3 |
| 5 |
| 2 |
| 7 |
| 3 |
| 5 |
=135÷(
| 2 |
| 7 |
| 3 |
| 5 |
| 2 |
| 7 |
| 3 |
| 5 |
| 2 |
| 7 |
| 3 |
| 5 |
=135÷
| 31 |
| 35 |
=135×
| 35 |
| 31 |
=175+1,
=176.
点评:注意观察题目中数字构成的特点和规律,善于灵活运用运算定律或运算技巧,巧妙解答.
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