zj14180504
幼苗
共回答了20个问题采纳率:90% 举报
(1)
4
9 ×
1
5 ÷
4
5
=
4
9 ×
1
5 ×
5
4 ,
=
1
9 ;
(2)4-
5
11 -
6
11
=4-(
5
11 +
6
11 ),
=4-1,
=3;
(3)
1
8 ×58+42÷8
=
1
8 ×58+42×
1
8 ,
=(58+42)×
1
8 ,
=100×
1
8 ,
=12.5;
(4)36×(
2
3 +
1
6 -
3
4 )
=36×
2
3 +36×
1
6 -36×
3
4 ,
=24+6-27,
=3;
(5)(15-14×
4
7 )×
8
21
=(15-8)×
8
21 ,
=7×
8
21 ,
=
8
3 ;
(6)
4
5 ÷
5
8 -
1
2 ÷
5
8
=
4
5 ×
8
5 -
1
2 ×
8
5 ,
=(
4
5 -
1
2 )×
8
5 ,
=
3
10 ×
8
5 ,
=
12
25 .
1年前
1