416+217= 0.85-0.5= 15%÷25%= + × =
0.12-0.13= 1÷ × = 5÷6+1÷ = + - - =
①205×18-6513÷13
②60÷ +60÷
③ -( + )+
④ ×11+ ×20
⑤ + ÷ +
⑥[ -( + )]×