lyjcooyee
幼苗
共回答了16个问题采纳率:75% 举报
(1)
1
12 +[(
1
6 +
1
12 )+
1
3 ],
=
1
12 +[(
2
12 +
1
12 )+
1
3 ],
=
1
12 +[(
2
12 +
1
12 )+
4
12 ],
=
1
12 +
7
12 ,
=
2
3 ;
(2)28×
26
27 ,
=(27+1)×
26
27 ,
=27×
26
27 +
26
27 ,
=26+
26
27 ,
=26
26
27 ;
(3)
9
14 -(
2
7 +
3
14 ),
=
9
14 -
2
7 -
3
14 ,
=
9
14 -
4
14 -
3
14 ,
=
1
7 ;
(4)85×
3
86 ,
=(86-1)×
3
86 ,
=86×
3
86 -
3
86 ,
=3-
3
86 ,
=2
83
86 ;
(5)236÷
5
9 +236÷
5
41 ,
=236×
9
5 +236×
41
5 ,
=236×(
9
5 +
41
5 ),
=236×10,
=2360;
(6)
5
9 ×
8
15 ÷
4
9 ,
=
5
9 ×
8
15 ×
9
4 ,
=
2
3 ;
(7)45÷(1-
2
5 )÷(1-
3
8 ),
=45÷
3
5 ÷
5
8 ,
=45×
5
3 ×
8
5 ,
=120.
1年前
6