4×=
×=
=
×2.5=
3÷= -= 9.9%÷0.1= ×4÷4×=
2.4×= += 1-25%= (-)×16=
×16= 12÷ = × =
0× + = 1÷ = ÷ =
÷ = × ÷ × =
3.14×6= 2×3.14×12= + =
0÷20%= 60×30%= 25÷40%=
36× = ÷ = 3× ÷3× =
9.9×5.9 60 1