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ADDITION Self-Correcting Quiz - Up Through the THREES

1
3
+  8
2
2
+  2
3
6
+  3
4
2
+  6
5
3
+  5
6
3
+  9
7
6
+  0
8
3
+  7
9
7
+  2
10
2
+  2
11
8
+  2
12
5
+  3
13
5
+  2
14
2
+  9
15
2
+  3
16
1
+  6
17
3
+  2
18
8
+  3
19
4
+  3
20
7
+  3
21
2
+  4
22
2
+  8
23
3
+  3
24
2
+  7
25
9
+  3
26
3
+  6
27
9
+  2
28
3
+  4
29
2
+  5
30
4
+  2
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