2.5+0.5=
0.07×10=
1-0.25=
4.5-1.09=
0.4×5=
12.4n-4n=
0.16÷0.4=
2.4×0.5=
4÷0.05=
0.32=
1-0.92= - = ×3.2= ÷ ×5=
3.5+4.28= × = ÷ = 99×0.9+0.9=