题目内容
(
-
)÷
+
(
+
-
)÷
.
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 2 |
| 5 |
| 6 |
(
| 1 |
| 12 |
| 1 |
| 2 |
| 7 |
| 12 |
| 1 |
| 7 |
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:(
-
)÷
+
,
=
÷
+
,
=
+
,
=1;
(
+
-
)÷
,
=(
-
)÷
,
=0÷
,
=0.
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 2 |
| 5 |
| 6 |
=
| 1 |
| 12 |
| 1 |
| 2 |
| 5 |
| 6 |
=
| 1 |
| 6 |
| 5 |
| 6 |
=1;
(
| 1 |
| 12 |
| 1 |
| 2 |
| 7 |
| 12 |
| 1 |
| 7 |
=(
| 7 |
| 12 |
| 7 |
| 12 |
| 1 |
| 7 |
=0÷
| 1 |
| 7 |
=0.
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,关键是计算的准确性.
练习册系列答案
相关题目