题目内容
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[
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分析:依据四则混合运算顺序: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顺序即可解答.
解答:解:
-(
+
)×
=
-
×
=
-
=
;
×
-
÷4
=
-
=
;
×[1÷(
+
)]
=
×[1÷
]
=
×
=
;
[
-(
-
)]×
=[
-
]×
=
×
=
.
| 3 |
| 4 |
| 1 |
| 5 |
| 1 |
| 3 |
| 9 |
| 8 |
=
| 3 |
| 4 |
| 8 |
| 15 |
| 9 |
| 8 |
=
| 3 |
| 4 |
| 3 |
| 5 |
=
| 3 |
| 20 |
| 2 |
| 5 |
| 3 |
| 4 |
| 1 |
| 2 |
=
| 3 |
| 10 |
| 1 |
| 8 |
=
| 7 |
| 40 |
| 5 |
| 8 |
| 3 |
| 4 |
| 1 |
| 3 |
=
| 5 |
| 8 |
| 13 |
| 12 |
=
| 5 |
| 8 |
| 12 |
| 13 |
=
| 15 |
| 26 |
[
| 1 |
| 6 |
| 5 |
| 14 |
| 1 |
| 3 |
| 7 |
| 9 |
=[
| 1 |
| 6 |
| 1 |
| 42 |
| 7 |
| 9 |
=
| 1 |
| 7 |
| 7 |
| 9 |
=
| 1 |
| 9 |
点评:本题考查知识点:依据四则运算顺序正确进行计算,关键是计算结果要准确.
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