Addition
200+25
225
500-300
200
4x4
16
10x3
30
1/2x2/3
2/6
300+75
375
16-8
8
3x7
21
4x9
36
2/3x4/5
8/15
25+75
100
45-5
40
7x6
42
300-250
50
4/5x1/2
4/10
25+50
75
65-10
55
8x5
40
45-10
35
1/3x4/5
4x15
500+600
1,100
100-75
25
9x7
63
500-10
490
5/6x3/5
15/30