ADDITION Self-Correcting Quiz - Up Through the THREES

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