题目内容
(1
×8.12+5
÷
×8
)÷4
.
| 1 |
| 1998 |
| 31 |
| 75 |
| 2 |
| 3 |
| 1997 |
| 1998 |
| 11 |
| 48 |
分析:本题可先将括号中的小数化成分数后,再根据乘法分配律计算.
解答:解:(1
×8.12+5
÷
×8
)÷4
=(1
×
+
×
×8
)×
=(1
×
+
×8
)×
=
×(1
+8
)×
=
×10×
=11.2.
| 1 |
| 1998 |
| 31 |
| 75 |
| 2 |
| 3 |
| 1997 |
| 1998 |
| 11 |
| 48 |
=(1
| 1 |
| 1998 |
| 203 |
| 25 |
| 406 |
| 75 |
| 3 |
| 2 |
| 1997 |
| 1998 |
| 48 |
| 203 |
=(1
| 1 |
| 1998 |
| 203 |
| 25 |
| 203 |
| 25 |
| 1997 |
| 1998 |
| 48 |
| 203 |
=
| 203 |
| 25 |
| 1 |
| 1998 |
| 1997 |
| 1998 |
| 48 |
| 203 |
=
| 203 |
| 25 |
| 28 |
| 203 |
=11.2.
点评:完成此类题目要注意分析题目中数据特点及内在联系,然后运用合适的方法简算.
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