括号里最大能填几. ×6<40 ×6<63 ×9<80 ×7<70 42> ×7 43﹣ <25.
3÷4= 小数= :8== %
2= ÷4== %= :8.
= :32=0.875=7÷ = %.
30: === 成= %
:160=18÷ = %= =0.45.