①8.59﹣4.13﹣0.87
②125×32×0.25
③
④
19+23=
5﹣1.6=
0.23÷0.1=
0.4×0.2=
=
÷0.25=
﹣= 14×= ÷= 1÷﹣÷1=
0.03÷0.5= 3.6﹣0.36= 0.43= 9+9÷9+9=
①1204+879+121
②74×60%+×25+0.6
③1.2÷×(0.6﹣)
④×[﹣(+)]
①3.6﹣2.8+7.4﹣7.2
②1.25×1.6×25
③÷4
④÷[(﹣)×]