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ADDITION Self-Correcting Quiz - ZEROS

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