87+13= 53+=87 49+=68
-69=22 94-=27 73-29=
35+6=
30+56=
48+20-7=
23+25=
54+18=
29-20+7=
78-7=
90-39=
6+30+34=
①45+28+27=
②80-28-34=
③96-47+29=
④68+28-57=
⑤93-27-35=
⑥6+78-48=