题目内容
计算.
-
+
=
1-
×
=
+
×
=
(
+
)×
=
1-
×
=
×(
+
)=
| 5 |
| 7 |
| 5 |
| 14 |
| 7 |
| 14 |
1-
| 5 |
| 7 |
| 2 |
| 5 |
| 1 |
| 5 |
| 3 |
| 5 |
| 2 |
| 9 |
(
| 1 |
| 2 |
| 3 |
| 8 |
| 1 |
| 14 |
1-
| 1 |
| 2 |
| 4 |
| 11 |
| 3 |
| 14 |
| 2 |
| 3 |
| 1 |
| 2 |
分析:(1)按照从左到右顺序解答,
(2)(5)按照先算乘法,再算减法顺序解答,
(3)按照先算乘法,再算加法顺序解答,
(4)(6)按照先算括号里面的,再算括号外面的顺序解答.
(2)(5)按照先算乘法,再算减法顺序解答,
(3)按照先算乘法,再算加法顺序解答,
(4)(6)按照先算括号里面的,再算括号外面的顺序解答.
解答:解:(1)
-
+
=
+
=
;
(2)1-
×
=1-
=
;
(3)
+
×
=
+
=
;
(4)(
+
)×
=
×
=
;
(5)1-
×
=1-
=
;
(6)
×(
+
)
=
×
=
.
| 5 |
| 7 |
| 5 |
| 14 |
| 7 |
| 14 |
=
| 5 |
| 14 |
| 7 |
| 14 |
=
| 6 |
| 7 |
(2)1-
| 5 |
| 7 |
| 2 |
| 5 |
=1-
| 2 |
| 7 |
=
| 5 |
| 7 |
(3)
| 1 |
| 5 |
| 3 |
| 5 |
| 2 |
| 9 |
=
| 1 |
| 5 |
| 2 |
| 15 |
=
| 1 |
| 3 |
(4)(
| 1 |
| 2 |
| 3 |
| 8 |
| 1 |
| 14 |
=
| 7 |
| 8 |
| 1 |
| 14 |
=
| 1 |
| 16 |
(5)1-
| 1 |
| 2 |
| 4 |
| 11 |
=1-
| 2 |
| 11 |
=
| 9 |
| 11 |
(6)
| 3 |
| 14 |
| 2 |
| 3 |
| 1 |
| 2 |
=
| 3 |
| 14 |
| 7 |
| 6 |
=
| 1 |
| 4 |
点评:依据四则运算顺序正确进行计算,是本题考查知识点.
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