50
+
____________________
=
90
10
+
____________________
=
70
60
+
____________________
=
90
40
+
____________________
=
80
10
+
____________________
=
60
80
+
____________________
=
90
40
+
____________________
=
100
30
+
____________________
=
50
40
+
____________________
=
60
70
+
____________________
=
80
40
-
____________________
=
10
80
-
____________________
=
30
100
-
____________________
=
80
70
-
____________________
=
30
50
-
____________________
=
20
80
-
____________________
=
40
70
-
____________________
=
50
60
-
____________________
=
30
90
-
____________________
=
50
70
-
____________________
=
6
0
