zhoujian131421
幼苗
共回答了13个问题采纳率:84.6% 举报
(1)
1
5 ×4÷
4
5 ,
=
1
5 ×4×
5
4 ,
=1;
(2)
3
14 +
3
14 ×13,
=
3
14 ×(13+1),
=
3
14 ×14,
=3;
(3)
4
25 ×
3
8 ÷
4
25 ×
3
8 ,
=
4
25 ×
3
8 ×
25
4 ×
3
8 ,
=
9
64 ;
(4)
3
8 -0.3×
5
6 ,
=
3
8 -
3
10 ×
5
6 ,
=
3
8 -
1
4 ,
=
1
8 ;
(5)68×(
15
17 -
9
34 ),
=68×
15
17 -68×
9
34 ,
=60-18,
=42;
(6)[1-(
1
4 +
3
8 )]÷
1
4 ,
=[1-
5
8 ]÷
1
4 ,
=
3
8 ×4,
=
3
2 .
1年前
1