题目内容
(2012?广元模拟)5-3
÷(1
+2.25×
)
| 7 |
| 8 |
| 5 |
| 6 |
| 1 |
| 3 |
分析:本题根据四则混合运算的运算顺序计算即先算小括号内部的,再计算小括号外面的.
解答:解:5-3
÷(1
+2.25×
),
=5-3
÷(1
+2.25×
),
=5-3
÷(
+
×
),
=5-
÷(
+
),
=5-
÷
,
=5-
×
,
=5-1.5,
=3.5.
| 7 |
| 8 |
| 5 |
| 6 |
| 1 |
| 3 |
=5-3
| 7 |
| 8 |
| 5 |
| 6 |
| 1 |
| 3 |
=5-3
| 7 |
| 8 |
| 11 |
| 6 |
| 9 |
| 4 |
| 1 |
| 3 |
=5-
| 31 |
| 8 |
| 22 |
| 12 |
| 9 |
| 12 |
=5-
| 31 |
| 8 |
| 31 |
| 12 |
=5-
| 31 |
| 8 |
| 12 |
| 31 |
=5-1.5,
=3.5.
点评:本题考查了学生分数小数混合运算能力及做题的认真程度.
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