+0.74÷
-75%
① 
②7.25-(1.25+
)
③9.6×27-9.6×17
④ 
⑤ 
⑥ 
①12.78+(3.9+2.22)
②53×99
③520×(80-720÷9)
④450÷50+30×12
⑤6000÷125÷8
⑥365×14-14×265
①(67+33)×25-780
②310+390÷30-137
③72×125
④(920+438÷73)×34
⑤2.3+4.69+15.31+6.7
⑥9.14-1.43-4.57
⑦[510-(150+120)]÷16
⑧23×8+6×23-23×4
①78×134+66×78
②3600÷45÷2
③3.6+5.31+6.4+5.69
④125×64×8
⑤78.12-0.76-0.24
⑥600-(504-216)÷24
①99×57
②17.96-4.04-7.96
③25×16×125
④44+4.8+156+5.2
⑤7.5×12.5-25×0.75
⑥36×[480÷(93-69)]
①675-(275+43)
②1.83+3.7+6.3+5.17
③18.7-4.79+5.03
④296+204÷(52-35)
⑤312×33+33×188
⑥25×32×125