0.4+6.6= 1-7÷8= 2.4×5= 3.4+2.6÷10%=
10-3.6× = :0.1= ×8÷ ×8= 9×( )=
3﹣0.09= 21÷35= 0.77+0.33= 0.4×0.9÷0.4×0.9=
2÷= 0.42﹣0.32= 0.625÷0.25= =
10.9+7%= 3÷ = 0.62= × =
1÷0.001= 6× ÷ ×6= 10.05-1.3-8.7= 7190÷83≈(保留两位小数)
265-30= 0.25×400= 56÷= +1.25= 6×70%= 0.24÷0.6= 3.14×42=
……