WO的ZUI爱
幼苗
共回答了20个问题采纳率:90% 举报
(1)3
1
10 ×7,
=(3×7)+(
1
10 ×7),
=21+
7
10 ,
=21
7
10 ;
(2)(
1
2 +1÷
2
7 )÷
15
7 ,
=(
1
2 +1×
7
2 )×
7
15 ,
=(
1
2 +
7
2 )×
7
15 ,
=4×
7
15 ,
=
28
15 ,
=1
13
15 ;
(3)9×
3
8 ×
5
27 ,
=9×
3
8 ×
5
27 ,
=
5
8 ;
(4)
11
18 ×
5
9 +
5
9 ×
7
18 ,
=(
11
18 +
7
18 )×
5
9 ,
=1×
5
9 ,
=
5
9 ;
(5)2.35+
2
9 ÷
1
9 +2.35,
=2.35+
2
9 ×
9
1 +2.35,
=2.35+2+2.35,
=6.7;
(6)(
1
4 +
1
2 )÷(
2
3 -
2
5 ),
=
3
4 ÷
4
15 ,
=
3
4 ×
15
4 ,
=
45
16 ,
= 2
13
16 ;
(7)(
3
8 +
1
4 ) ÷
3
16 ,
=(
3
8 +
1
4 )×
16
3 ,
=
3
8 ×
16
3 +
1
4 ×
16
3 ,
=2 +
4
3 ,
= 3
1
3 ;
(8)(
3
4 +
1
6 -
3
24 ) ÷
1
24 ,
=
3
4 × 24+
1
6 ×24-
3
24 ×24,
=18+4-3,
=19;
(9)25÷(
1
4 -
1
9 ),
=25÷(
9
36 -
4
36 ),
=25×
36
5 ,
=180.
1年前
8