ֱ��д��57-37=13-15=512+16=35+110=1-12-14=1712-16-56=89-13=49+79=-��ѧ ��ӡҳ��

ֱ��д��57-37=13-15=512+16=35+110=1-12-14=1712-16-56=89-13=49+79=-��ѧ

[db:��] 2019-05-13 08:00:00 ��

��

ֱ��д��
5
7
-
3
7
=
1
3
-
1
5
=
5
12
+
1
6
=
3
5
+
1
10
=
1-
1
2
-
1
4
=
17
12
-
1
6
-
5
6
=
8
9
-
1
3
=
4
9
+
7
9
=
��ͣ�� Ѷȣ��е�

��

5
7
-
3
7
=
2
7
1
3
-
1
5
=
2
15
5
12
+
1
6
=
7
12
3
5
+
1
10
=
7
10
1-
1
2
-
1
4
=
1
4
17
12
-
1
6
-
5
6
=
5
12
8
9
-
1
3
=
5
9
4
9
+
7
9
=
11
9
��

��ר��Ȩ��⡰ֱ��д��57-37=13-15=512+16=35+110=1-12-14=1712-16-56=89-1..��Ҫ�� ļӷ��ͼ��ĸ�� ȿ��⡣��Щ��ġ��£�

��ļӷ��ͼ��ĸ��

��ƣ��ļӷ��ͼ��ĸ��

��ӡ��㷨��
�ٷ�ĸ��ͬʱ��ֻ�ѷ��ӡ��ĸ��䣻
��1/2+3/2=(1+3)/2=4
�ڷ�ĸ��ͬʱ��Ҫ��ͨ�ֳ�ͬ��ĸ��ӡ��
1/2+2/3=3/6+4/6=7/6

http://www.00-edu.com/ks/shuxue/1/fenshudejiafahejianfayifenmu/2019-05-13/1114033.htmlʮ��Ф
ʮ��