题目内容
(2010?茶陵县模拟)脱式计算.
46×8-120÷15
40-7.5×1.2
÷[(
+
)×
].
46×8-120÷15
40-7.5×1.2
4 |
9 |
2 |
5 |
1 |
10 |
4 |
3 |
分析:依据四则运算计算方法,先算第二级运算,再算第一级运算,如果只含有同一级运算,按照从左到右顺序计算,有括号先算括号里面的解答.
解答:解:46×8-120÷15,
=368-8,
=360;
40-7.5×1.2,
=40-9,
=31;
÷[(
+
)×
],
=
÷[
×
],
=
÷
,
=
.
=368-8,
=360;
40-7.5×1.2,
=40-9,
=31;
4 |
9 |
2 |
5 |
1 |
10 |
4 |
3 |
=
4 |
9 |
1 |
2 |
4 |
3 |
=
4 |
9 |
2 |
3 |
=
2 |
3 |
点评:本题主要考查学生依据四则运算计算方法解决问题的能力.
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