1-+= 1÷×= 7-= 65÷0.05=
7÷×7×= 2÷2%= 0÷0.1-0.1×1= (+)×24=
x:=0.5: = 0.2x-1.5=
15.1-3.5+6.5= 8× ÷8× = 4203÷59≈ 0.42-0.32=
18××= 4÷-÷4= 3.6÷2×5= +0.2=
÷3= 0.88+1.22= +25%= 5--= 1÷+÷1=
10-20%= 0÷1= 0.9×= 1-+= 1.25×4×2.5×8=
10.4+ = ÷70%= 1÷10%= 0÷1%=
24×25%= 1-75%= 180%- = 2×80%=
☆☆☆☆☆