①75.6×27﹣170×7.56
②
③
④
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 + + + + +
①634﹣3.2×1.5÷0.1
②9.43+0.78﹣3.43
⑤
⑥