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ADDITION Self-Correcting Quiz - Up Through the TWOS

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