Basic
1+1
2
7+7
14
13+13
26
11
100+100
200
2+2
4
8+8
16
14+14
28
6 + 7
13
200+200
400
6 is?
3 + 3
9+9
18
15+15
30
8 + 9
17
400+400
800
4+4
8
20 is?
10 + 10
25 + 25
50
20 + 21
41
230+230
460
10 is?
4 + 4
11+11
22
60 is?
30 + 30
What is 29?
14 + 15 or 15 + 14
What is 680?
340 + 340