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ADDITION Self-Correcting Quiz - THREES

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