6040毫升6升 7升720毫升 140÷35120÷30
630÷70540÷54 800÷25900÷20 360÷12720÷24
+380=470 -205=500 +25万=60万
840-=190 245+=650 72万-=42万
=0
402÷6=
4002÷6=
40002÷6=
400002÷6=
4000002÷6=
40000002÷6=
98×9+ 6=
987×9+5=
9876×9+4=
98765×9+3=
987654×9+2=
9876543×9+1=
68+32= 10-0.6= 1.25×80= 0.8÷0.04=
2.4÷ = × = 5×8%= ÷ =