ADDITION Self-Correcting Quiz - ZEROS

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