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ADDITION Self-Correcting Quiz - FOURS

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