-
|
+
|
=7
|
|||
:
|
n
|
×
|
n
|
+
|
n
|
+
|
3
|
-
|
=1
|
||
+
|
n
|
-
|
n
|
-
|
n
|
-
|
×
|
=9
|
|||
=9
|
n
|
=5
|
n
|
=5
|
n
|
8
|
-
|
3
|
+
|
2
|
=7
|
:
|
n
|
×
|
n
|
+
|
n
|
4
|
+
|
3
|
-
|
6
|
=1
|
+
|
n
|
-
|
n
|
-
|
n
|
7
|
-
|
4
|
×
|
3
|
=9
|
=9
|
n
|
=5
|
n
|
=5
|
n
|