雨飘飘
花朵
共回答了21个问题采纳率:100% 举报
(1)
2
5 +
9
14 +
5
14 ,
=
2
5 +(
9
14 +
5
14 ),
=
2
5 +1,
=1
2
5 ;
(2)
1
4 +
3
7 +
3
4 +
4
7 ,
=(
1
4 +
3
4 )+(
3
7 +
4
7 ),
=1+1,
=2;
(3)
11
20 +
4
9 +
9
20 -
4
9 ,
=(
11
20 +
9
20 )+(
4
9 -
4
9 ),
=1+0,
=1;
(4)
6
7 -(
4
7 +
1
14 ) ,
=
6
7 -
4
7 -
1
14 ,
=
2
7 -
1
14 ,
=
3
14 ;
(5)
11
18 -
5
8 +
17
18 -
3
8 ,
=(
11
18 +
17
18 )-(
5
8 +
3
8 ),
=1
5
9 -1,
=
5
9 ;
(6) 6-
2
7 -
5
7 ,
=6-(
2
7 +
5
7 ),
=6-1,
=5;
(7)
9
16 -(
3
4 -
3
16 ),
=
9
16 -
3
4 +
3
16 ,
=
9
16 +
3
16 -
3
4 ,
=
3
4 -
3
4 ,
=0;
(8)
2
7 +(
3
5 +
1
7 )-
1
5 ,
=
2
7 +
3
5 +
1
7 -
1
5 ,
=(
2
7 +
1
7 )+(
3
5 -
1
5 ),
=
3
7 +
2
5 ,
=
29
35 .
1年前
5