3+1=
4
1-1=
0
2+2=
3+4=
7
25+25=
50
5+1=
6
6-1=
5
6+6=
12
6+5=
11
30+30=
60
10+1=
14-1=
13
7+7=
14
7+8=
15
100+100=
200
18+1=
19
18-1=
17
20
8+9=
150+150=
300
13+1=
16-1=
9+9=
18
11+12=
23
350+220=
570
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