题目内容
用你喜欢的方法计算下面各题. (1)1-
|
(2)
|
(3)
| ||||||||||||||||||||
(4)(
|
(5)
|
(6)
|
分析:(1)先算除法,再算减法;
(2)先算除法,再算乘法;
(3)按照从左向右的顺序进行计算;
(4)根据乘法分配律进行简算;
(5)根据加法交换律和结合律进行简算;
(6)根据乘法分配律进行简算.
(2)先算除法,再算乘法;
(3)按照从左向右的顺序进行计算;
(4)根据乘法分配律进行简算;
(5)根据加法交换律和结合律进行简算;
(6)根据乘法分配律进行简算.
解答:解:(1)1-
÷
=1-
=
;
(2)
÷4×
=
×
=
;
(3)
÷0.8÷
=
÷
=9;
(4)(
-
)×36
=
×36-
×36
=21-10
=11;
(5)
+
+
+
=(
+
)+(
+
)
=1+1
=2;
(6)
×
+
×
=
×(
+
)
=
.
7 |
9 |
7 |
8 |
=1-
8 |
9 |
=
1 |
9 |
(2)
8 |
13 |
5 |
6 |
=
2 |
13 |
5 |
6 |
=
5 |
39 |
(3)
3 |
5 |
1 |
12 |
=
3 |
4 |
1 |
12 |
=9;
(4)(
7 |
12 |
5 |
18 |
=
7 |
12 |
5 |
18 |
=21-10
=11;
(5)
5 |
9 |
3 |
11 |
4 |
9 |
8 |
11 |
=(
5 |
9 |
4 |
9 |
3 |
11 |
8 |
11 |
=1+1
=2;
(6)
7 |
18 |
1 |
4 |
3 |
4 |
7 |
18 |
=
7 |
18 |
1 |
4 |
3 |
4 |
=
7 |
18 |
点评:此题主要考查分数的四则混合运算的运算顺序和应用运算定律进行简便计算.
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