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ADDITION Self-Correcting Quiz - Up Through the FOURS

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