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ADDITION Self-Correcting Quiz - TWOS

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