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(1)47

来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/13 15:58:51
(1)
4
7
(1)
4
7+3.52+
3
7+48%,
=(
4
7+
3
7)+(3.52+48%),
=1+4,
=5;
(2)
3

1
11+
1
11×
1
4,
=(
3
4+
1
4)×
1
11,
=1×
1
11,
=
1
11;
(3)
5
7÷(5-3.9×
2
3),
=
5
7÷(5-2.6),
=
5
7÷2.4,
=
5

12
5,
=
5

5
12,
=
25
84;
(4)25-25×
99
100,
=25×(1-
99
100),
=25×
1
100,
=
1
4;
(5)1000÷32÷0.25÷0.125,
=1000÷(4×8)÷
1

1
8,
=1000÷4÷8×4×8,
=1000×(4÷4)×(8÷8),
=1000;
(6)38
3
4-15.38+61.25-4.62,
=38.75-15.38+61.25-4.62,
=(38.75+61.25)-(15.38+4.62),
=100-20,
=80.