Addition
15+15
30
12x2
24
2-2
0
10/2
5
12+45
57
25+25
50
44x3
132
20-20
40
12/3
4
48x3
144
55+55
110
547x5
2735
30-20
10
300/3
100
100/5
20
125+130
255
1080x4
4320
250-50
200
80/2
160
238-56
182
1528+244
1772
5400x7
37800
1500-200
1300
1200/4
300
2625/3
875