流动的珍珠
幼苗
共回答了13个问题采纳率:92.3% 举报
①
7
10 ÷9 +
3
10 ×
1
9
=
7
10 ×
1
9 +
3
10 ×
1
9
=
1
9 ×(
7
10 +
3
10 )
=
1
9 ×1
=
1
9 ;
②4-
7
15 -
8
15
=4-(
7
15 +
8
15 )
=4-1
=3;
③[2-(
3
4 +
1
3 )]÷
2
3
=[2-
13
12 ]×
3
2
=
11
12 ×
3
2
=1
3
8 ;
④14×(
4
7 +
1
2 )÷
3
2
=(14×
4
7 +14×
1
2 )×
2
3
=15×
2
3
=10.
1年前
9