38+=115
68+=183
93+=247
-68=79
-74=108
-125=164
84+63=
75+124=
133+258=
4×6=
5×8=
6×7=
12÷6=
18÷2=
21÷3=

-125=278-127
63+78+86+92=
144-82=+58
77+69+121-235=
84++78=203
183+82-95-151=
153+-37=222
500-173-214-100=