①÷4×
②(+-)÷
③(+-)×12
①
②
③
④
⑤
⑥
① ×[0.75﹣( ﹣25%)]÷1.25
②6.37×1.25﹣1 +4.63×125%
③7.09× +0.225×6﹣60%×0.64
④ ×3+ ×25+ ×
0.56÷0.8= = = =
5×( )= 30×= 0.53= 3﹣=