0.15×6= 25.6×25%= 0.4 := 3.14×7.6-3.14×3.6=
0.810.1= 2.1÷=
(1-25%)÷(1+) 2.4÷(1-30%-40%)
(填最大数)
2019-998= = = =
= = = =
+= -= ÷= 6-=
186-59=
6.8+2=
5.4÷0.9=
90×90%=
0.25×( )=1
3.12-0.2=
4.2÷=
÷= ×= 18÷= ×=
:= 75kg:= :15分=