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ADDITION Self-Correcting Quiz - SIXES

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