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ADDITION Self-Correcting Quiz - Up Through the THREES

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