题目内容

计算下列各题.
(1)
3
7
×
1
4
÷
3
4

(2)(25+
2
3
)×4
(3)(15-14×
4
7
)÷
8
21

(4)(
3
8
-25%)
×8÷
5
6
×
5
2
(1)
3
7
×
1
4
÷
3
4

=
3
7
×
1
4
×
4
3

=
1
7

(2)(25+
2
3
)×4,
=25×4+
2
3
×4,
=100+2
2
3

=102
2
3

(3)(15-14×
4
7
)÷
8
21

=(15-8)÷
8
21

=7÷
8
21

=7×
21
8

=18
3
8

(4)(
3
8
-25%
)×8÷
5
6
×
5
2

=(
3
8
×8-25%×8)÷
5
6
×
5
2

=(3-2)÷
5
6
×
5
2

=1×
6
5
×
5
2

=3.
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