13-□=□
52-20=
52-2=
98-80=
98-8=
68-3=
68-30=
①17-5-7=
②18-8+9=
③9+8-10=
④11+9-5=
⑤15+5-5=
⑥20-10+9=
⑦16-5+1=
⑧13+5-9=
⑨11+0+7=
⑩4+9+3=
49+= 53 +34=64 34+8=7+
-34=25 -18=69 17-5=4+
>>>>