÷=
+×=
×=
×÷×=
1÷(+)=
÷0.1=
0.23=
4.5:=
﹣0.5= +3= ×= 0.8×=
0.23+177%= 2.5×40= 1÷= ×÷×=
18× = 3.5× = × =
5.6÷ = ÷4= ÷ =