tt人xy
幼苗
共回答了31个问题采纳率:87.1% 举报
(1)
2
5 +
3
8 +
5
8 ,
=
2
5 +(
3
8 +
5
8 ),
=
2
5 +1,
=1
2
5 ;
(2)10-
1
5 -
4
5 ,
=10-(
1
5 +
4
5 ),
=10-1,
=9;
(3)
5
18 -(
5
18 -
7
25 ),
=(
5
18 -
5
18 )+
7
25 ,
=
7
25 ;
(4)
9
17 +(
5
12 +
8
17 ),
=(
9
17 +
8
17 )+
5
12 ,
=1+
5
12 ,
=1
5
12 ;
(5)
4
9 +
1
16 +
15
16 +
5
9 ,
=(
4
9 +
5
9 )+(
1
16 +
15
16 ),
=1+1,
=2;
(6)
16
25 -(
14
19 -
9
25 ),
=
16
25 -
14
19 +
9
25 ,
=(
16
25 +
9
25 )-
14
19 ,
=1-
14
19 ,
=
5
19 .
1年前
3