2.4+0.9=
1×20%=
32=
0.13=
÷3= ×0.625= - ×0= 28× =
4.8÷0.8= × = 7π= 0.5²=
× = × = 10- = ÷4= ÷3=
72× = 0× ×25= ×14+ = 17× = ( + )× =