题目内容
计算.
|
|
| ||||||||||||||||||||
(
|
|
(
|
分析:(1)按照先算括号里面的,再算括号外面的顺序解答,
(2)(3)按照先算第二级运算,再算第一级运算顺序解答,
(4)(5)(6)运用乘法分配律解答.
(2)(3)按照先算第二级运算,再算第一级运算顺序解答,
(4)(5)(6)运用乘法分配律解答.
解答:解:(1)
÷(
-
)
=
÷
=
;
(2)
+
×
=
+
=
;
(3)
×4-
=
-
=
;
(4)(
+
)÷
=
×
+
×
=
+1
=1
;
(5)
×
+
×
=
×(
+
)
=
×
=
;
(6)(
-
)×
=
×
-
×
=
-
=
.
| 3 |
| 8 |
| 3 |
| 4 |
| 1 |
| 8 |
=
| 3 |
| 8 |
| 5 |
| 8 |
=
| 3 |
| 5 |
(2)
| 5 |
| 12 |
| 7 |
| 12 |
| 4 |
| 5 |
=
| 5 |
| 12 |
| 7 |
| 15 |
=
| 53 |
| 60 |
(3)
| 3 |
| 8 |
| 3 |
| 4 |
=
| 3 |
| 2 |
| 3 |
| 4 |
=
| 3 |
| 4 |
(4)(
| 5 |
| 8 |
| 11 |
| 16 |
| 11 |
| 16 |
=
| 5 |
| 8 |
| 16 |
| 11 |
| 11 |
| 16 |
| 16 |
| 11 |
=
| 10 |
| 11 |
=1
| 10 |
| 11 |
(5)
| 3 |
| 8 |
| 1 |
| 6 |
| 1 |
| 2 |
| 3 |
| 8 |
=
| 3 |
| 8 |
| 1 |
| 6 |
| 1 |
| 2 |
=
| 3 |
| 8 |
| 2 |
| 3 |
=
| 1 |
| 4 |
(6)(
| 5 |
| 7 |
| 1 |
| 2 |
| 14 |
| 15 |
=
| 5 |
| 7 |
| 14 |
| 15 |
| 1 |
| 2 |
| 14 |
| 15 |
=
| 2 |
| 3 |
| 7 |
| 15 |
=
| 1 |
| 5 |
点评:本题主要考查学生依据四则运算顺序,以及运用乘法分配律解决问题的能力,关键是计算结果要准确.
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