题目内容
(1
×
+
)÷(11-1
)
| 8 |
| 13 |
| 13 |
| 42 |
| 2 |
| 3 |
| 2 |
| 3 |
分析:在解答时,按运算顺序进行计算,在运算过程中,注意约分.
解答:解:(1
×
+
)÷(11-1
),
=(
×
+
)÷9
,
=(
+
)÷9
,
=
×
,
=
.
| 8 |
| 13 |
| 13 |
| 42 |
| 2 |
| 3 |
| 2 |
| 3 |
=(
| 21 |
| 13 |
| 13 |
| 42 |
| 2 |
| 3 |
| 1 |
| 3 |
=(
| 1 |
| 2 |
| 2 |
| 3 |
| 1 |
| 3 |
=
| 7 |
| 6 |
| 3 |
| 28 |
=
| 1 |
| 8 |
点评:此题重点考查学生的运算顺序,以及对四则混合运算题的计算能力.
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