ADDITION Self-Correcting Quiz - SIXES

1
5
+  6
2
6
+  2
3
6
+  7
4
2
+  6
5
6
+  5
6
1
+  6
7
6
+  8
8
7
+  6
9
6
+  6
10
6
+  0
11
3
+  6
12
6
+  6
13
9
+  6
14
6
+  9
15
6
+  4
16
6
+  1
17
8
+  6
18
0
+  6
19
4
+  6
20
6
+  3