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ADDITION Self-Correcting Quiz - Up Through the TWOS

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