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ADDITION Self-Correcting Quiz - Up Through the THREES

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