÷2=
1÷ - ÷1=
8×1.25=
( + )×12=
0.32=
4.8a+0.2a=
2.07+0.3=
21×498≈
307﹣299= += ×0.63= A﹣A=
5.2﹣0.6= ÷= ×= 4.25×4=