ADDITION Self-Correcting Quiz - ONES

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