0×0.99=
0÷1.23=
1.23÷1=
0.99×1=
28.5-15=
2.5+0.5÷2=
1.8÷0.5×0.5=
2.45÷25÷0.4=
+ = 1- = 1.25× = - =
0.9+99×0.9= 0÷ = 1÷ = -0.5=
0.6×101= 3.2×2.5×12.5=