①
②
③
④
①960-900÷4÷25
②28.1-5.7+1.9-4.3
③4×()-0.4
④3.7×+1.3÷
⑤10÷()
⑥
①1.25×(30.1﹣24.91÷4.7)
②[ ﹣( ﹣ )]÷
③15.6×13.1﹣15.6﹣15.6×2.1
④2 ×23.4+11.1×57.6+6.54×28
⑤1234+2341+3412+4123
⑥ + + + + +