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ADDITION Self-Correcting Quiz - TWOS

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