21÷=
=
16÷=
÷0.5=
5÷=
×14=
÷5%=
10%×5=
1÷25%=
×4= ÷= 0.15×= 2.4×(+)
1.6÷= 18××= +×25%= ×÷×=
×12= 14÷=
0.5×0.6= 1-= ÷2=
×= ÷4= 1÷= ×0=
-= +1= 3.5×= ×40=