题目内容

选择合适的方法计算.
1.25×25×4×8
44×1.6-0.16×40
8.5-(5.6+4.8)÷1.3
3
7
×(
4
5
-
2
3
)÷
2
15
165×
4
7
+165×
3
7
4
5
+
1
4
)÷
7
3
+
7
10

(1)1.25×25×4×8,
=(1.25×8)×(25×4),
=10×100,
=1000;

(2)44×1.6-0.16×40,
=44×1.6-1.6×4,
=(44-4)×1.6,
=40×1.6,
=64;

(3)8.5-(5.6+4.8)÷1.3,
=8.5-10.4÷1.3,
=8.5-8,
=0.5;

(4)
3
7
×(
4
5
-
2
3
)÷
2
15

=
3
7
×
2
15
÷
2
15

=
3
7
×(
2
15
÷
2
15
),
=
3
7
×1,
=
3
7


(5)165×
4
7
+165×
3
7

=165×(
4
7
+
3
7
),
=165×1,
=165;

(6)(
4
5
+
1
4
)÷
7
3
+
7
10

=
21
20
÷
7
3
+
7
10

=
9
20
+
7
10

=
23
20
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