Number
0
1
2
3
4
​5
​6

7
8
9
10
11
​12
13
​14

15
16
17
18
​19
20
21
​22

23
24
25
​26
27
28
29
​30

Add/ Positive
Subtract/ Negative
Equal

For the rest from 30 to 99, 
just use 1-9 digits to tell the number.

​Note: Generally, for number 1 to 5, turn your hands facing you but for ID number, turn hands facing forward.