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ADDITION Self-Correcting Quiz - FOURS

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