①64×125+16×125
②(940-35×4)÷16
③64×5-52÷13
④680+21×15-360
⑤9000÷125÷8
⑥600÷[(197-189)×5]
①1800÷[(15+10)×3]
②15+75÷3
③212×4+188×4
④32×125
⑤19.92+14.4-9.92
⑥34.78-5.43-4.57