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ADDITION Self-Correcting Quiz - FOURS

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