题目内容

①[(9
1
5
-7
1
2
)÷2
3
4
]÷1
1
5

②0.52×2
4
9
+7
5
9
×0.52
③(1
2
5
-
4
5
)×(2+
2
3
)÷1
3
5

④[(4.25-3
1
8
)×2.4+10÷6
1
4
]÷0.13
⑤24×(
7
12
+
5
6
)÷(6.375-5
3
8

⑥(15
3
5
÷3-2
2
3
×1
7
8
)÷1
3
8
分析:完成本题根据四则混合运算法则计算即可,能简算的要据运算定律简算.
解答:解:(1)[(9
1
5
-7
1
2
)÷2
3
4
]÷1
1
5

=[
17
10
÷
11
4
]÷
6
5

=
34
55
×
5
6

=
17
33


(2)0.52×2
4
9
+7
5
9
×0.52
=(2
4
9
+7
5
9
)×0.52;
=10×0.52;
=5.2;

(3)(1
2
5
-
4
5
)×(2+
2
3
)÷1
3
5

=
3
5
×(
8
3
×
5
8
);
=
3
5
×
5
3

=1;

(4)[(4.25-3
1
8
)×2.4+10÷6
1
4
]÷0.13
=[(4
1
4
-3
1
8
)×2
2
5
+10÷
25
4
13
100

=[
9
8
×
12
5
+10×
4
25
13
100

=[
27
10
+
8
5
]÷
13
100

=
43
10
×
100
13

=33
1
13


(5)24×(
7
12
+
5
6
)÷(6.375-5
3
8

=24×
17
12
÷(6
3
8
- 5
3
8
);
=34×1;
=34;

(6)(15
3
5
÷3-2
2
3
×1
7
8
)÷1
3
8

=(
78
5
×
1
3
-
8
3
×
15
8
÷
11
8

=(
26
5
-5)×
8
11

=
1
5
×
8
11

=
8
55
点评:完成本题要认真分析式中数据,特别要注意分数、小数之间的转化.
练习册系列答案
相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网