①104﹣(50+288÷8)
②75+25÷25+75
③8000÷125÷8
④17×99+17
⑤960÷[190﹣(154+31)]
⑥25×28
①7.4﹣6.62+20.6﹣13.38
②×+×
③(-+)÷
④2×0.8×12.5×50%
⑤÷(÷+)
⑥×[1÷(+)]