345﹣298= 0.64÷0.8= ﹣ = × =
1÷0.05= 0.25×40= 2÷ = ×25%=
1﹣+= 1÷×= 0.5﹣+0.5﹣=
8.1+= (+)×24= 7××7÷=
+= ﹣= 3.5×= 2÷0.5=
5.6+4.4= 70÷0.01= 6.5×= 2-45%=
17×= = 75%÷= =
1.5×80= ÷2= ×= ÷0.125=
×= 7.29÷0.09= 60%+40=
÷8= 0.13= 721÷89≈
里程/千米
郑州一徐州
349
徐州一南京
348
南京一无锡
175
无锡一上海
126