honlang142
幼苗
共回答了15个问题采纳率:100% 举报
(1)12÷0.4÷
3
4 ,
=30÷
3
4 ,
=40;
(2)
5
17 ÷9+
1
9 ×
5
17 ,
=
5
17 ×
1
9 +
1
9 ×
5
17 ,
=
1
9 × (
5
17 +
5
17 ),
=
1
9 ×
10
17 ,
=
10
153 ;
(3)
4
9 ÷[(
5
6 -
1
2 )+(
5
9 -
5
18 )],
=
4
9 ÷[
1
3 +
5
18 ],
=
4
9 ÷
11
18 ,
=
8
11 ;
(4)24×(
3
8 +
1
6 +
5
12 ),
=24×
3
8 +24×
1
6 +24×
5
12 ,
=9+4+10,
=23;
(5)80×
1
8 ÷
1
800 ×
1
800 ,
=80×
1
8 ×800×
1
800 ,
=(80×
1
8 )×(800×
1
800 ),
=10×1,
=10;
(6)1.8×
3
4 +1.2×
3
4 -
3
4 ,
=(1.8+1.2-1)×
3
4 ,
=2×
3
4 ,
=
3
2 .
1年前
1