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ADDITION Self-Correcting Quiz - ZEROS

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