1-36%= += ×= -=
÷= 20×75%= ×20%= 9÷30%=
0.75:1= -×0= 0.75-25%=
7%×= 3.14×42=
×5=
28×20%=
÷=
4-=
+=
×=
2.4×=
30%÷10%=
16÷20%= 4.8÷(0.4+1.2)=
-(-)= 12÷0.25÷4=