2
/
3
+
4
/
6
=
____________________
/
6
____________________
/
____________________
+
1
/
2
=
1
____________________
/
4
+
2
/
4
=
5
/
4
2
/
4
-
1
/
2
=
____________________
1
/
2
+
3
/
4
=
____________________
/
4
5
/
____________________
-
2
/
7
=
3
/
7
