①650÷5×21
②45×35÷5
③10.9+29.4-5.3
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 + + + + +
①
②6.875﹣
③372÷25÷0.4
④77×