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ADDITION Self-Correcting Quiz - Up Through the THREES

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