14-6=
12-4 +20=
55-5=
73-70 +9=
13-7=
6-4+50=
94-90 =
13-4 +30 =
7+45=
27+7=
37+63=
70-23=
54-45=
14-9=
50-26=
27+32=
77-70=
65-42=
x
4
?
y
12
24
0.203dm3=cm3 1.02t=kg