50050.7004读作 ,四舍五入到“万”位约是 .
= ÷25=40%= :45.
24: == ÷1.2= 折=75%
= ×=36÷ = :13.5.
÷20=0.4= %=2: .
已知m÷n=7…1,则m÷n=.