subtracting
21-12=
9
100x4=
400
10.2-9.2=
1
10/1=
10
33+10=
43
132-22=
110
44x22=
968
21.22-10.22=
11
44/2=
22
111+212=
323
2121-122
1999
10x4=
40
212.22-212.22=
0
33/11=
3
1212+212122=
213334
1233-223=
1010
412x21=
8652
11.11-10.11=
1
434/3=
144.666666667
122+122=
244
44444-21212=
23232
3123x122=
381006
1212.21-21.12=
1191.09
232/2=
116
1212+122=
1224