j35305
幼苗
共回答了20个问题采纳率:90% 举报
①(
1
2 -
1
4 )÷
1
3 +
1
6 ,
=
1
4 ×3+
1
6 ,
=
9
12 +
2
12 ,
=
11
12 ;
②
3
4 ÷
9
10 -
5
14 ×
7
15 ,
=
3
4 ×
10
9 -
5
14 ×
7
15 ,
=
5
6 -
1
6 ,
=
2
3 ;
③
8
9 ×[
3
4 -(
7
16 -
1
4 )] ,
=
8
9 ×[
3
4 -
3
16 ],
=
8
9 ×
9
16 ,
=
1
2 ;
④102×
98
101 ,
=(101+1)×
98
101 ,
=101×
98
101 +1×
98
101 ,
=98+
98
101 ,
=98
98
101 ;
⑤
4
5 -
5
9 +
1
5 -
4
9 ,
=(
4
5 +
1
5 )-(
5
9 +
4
9 ),
=1-1,
=0;
⑥
8
13 ÷7+
1
7 ×
5
13 ,
=
8
13 ×
1
7 +
1
7 ×
5
13 ,
=
1
7 × (
5
13 +
8
13 ),
=
1
7 ×1 ,
=
1
7 .
1年前
10