题目内容
(1
-
×
)÷
+
.
| 4 |
| 9 |
| 2 |
| 3 |
| 5 |
| 6 |
| 4 |
| 5 |
| 1 |
| 5 |
分析:我们严格按照四则混合运算的顺序进行计算,先介绍括号内部的在街上括号外面的,计算计算时注意分数的通分与约分,分数的化简.
解答:解:(1
-
×
)÷
+
,
=(
-
)×
+
,
=
×
+
,
=
+
,
=
,
=1
.
| 4 |
| 9 |
| 2 |
| 3 |
| 5 |
| 6 |
| 4 |
| 5 |
| 1 |
| 5 |
=(
| 13 |
| 9 |
| 5 |
| 9 |
| 5 |
| 4 |
| 1 |
| 5 |
=
| 8 |
| 9 |
| 5 |
| 4 |
| 1 |
| 5 |
=
| 50 |
| 45 |
| 9 |
| 45 |
=
| 59 |
| 45 |
=1
| 14 |
| 45 |
点评:本题依据四则混合运算的顺序进行计算即可.
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