题目内容
计算下面各题.
|
|
18÷
| ||||||||||||||||||
|
|
|
分析:(1)(2)(3)按照从左到右顺序就是,
(4)(6)按照先算括号里面的,再算括号外面的顺序解答,
(5)运用除法性质解答.
(4)(6)按照先算括号里面的,再算括号外面的顺序解答,
(5)运用除法性质解答.
解答:解:(1)
×
×
=
×
=
;
(2)
×
÷
=
÷
=1
;
(3)18÷
×
=75×
=45;
(4)
÷(
×
)
=
÷
=
;
(5)
÷
÷
=
÷(
×
)
=
÷
=5;
(6)
×(
÷
)
=
×
=1
.
| 5 |
| 9 |
| 2 |
| 7 |
| 6 |
| 24 |
=
| 10 |
| 63 |
| 6 |
| 24 |
=
| 5 |
| 126 |
(2)
| 7 |
| 10 |
| 9 |
| 14 |
| 9 |
| 25 |
=
| 9 |
| 20 |
| 9 |
| 25 |
=1
| 1 |
| 4 |
(3)18÷
| 6 |
| 25 |
| 3 |
| 5 |
=75×
| 3 |
| 5 |
=45;
(4)
| 8 |
| 25 |
| 14 |
| 15 |
| 10 |
| 21 |
=
| 8 |
| 25 |
| 4 |
| 9 |
=
| 18 |
| 25 |
(5)
| 2 |
| 3 |
| 22 |
| 21 |
| 7 |
| 55 |
=
| 2 |
| 3 |
| 22 |
| 21 |
| 7 |
| 55 |
=
| 2 |
| 3 |
| 2 |
| 15 |
=5;
(6)
| 5 |
| 8 |
| 15 |
| 16 |
| 25 |
| 48 |
=
| 5 |
| 8 |
| 9 |
| 5 |
=1
| 1 |
| 8 |
点评:本题主要考查学生以及四则运算顺序正确进行计算,以及运用除法性质解决问题的能力.
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