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ADDITION Self-Correcting Quiz - ZEROS

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