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ADDITION Self-Correcting Quiz - Up Through the TWOS

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