ADDITION Self-Correcting Quiz - Up Through the THREES

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