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ADDITION Self-Correcting Quiz - TWOS

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