Addition
21+4
25
7-4
3
5,10,15.....
20
13 or 31
31
5x 5
25
11+30
41
15-5
10
3,6,9......
12
11 or 111
111
10x5
50
270+30
300
15-7
8
4,8,12...
16
46 or 63
63
square root of 25
5
25+27
45-26
19
12,24,36...
48
45 or 54
54
100 divided by 10
10
37+94
131
197-52
145
15,30,45...
60
101 or 110
110
25-(5+20)
0