从扇形统计图中能看出各种数量同总量的关系，还能看出各种数量的多少． ．
因为A×B=1，所以A=，B=．（A、B≠0） ．
÷7=÷ =38．
× =× = ×= ×0.1=+ = ﹣．
× =× =+ =1.5× =× =1．
× =3600 × =3600 × =3600 × =3600 × =3600．
，B=
．（A、B≠0） ．
÷ =38．
× =
× = ×
= ×0.1=
+ = ﹣
× =
× =
+ =1.5× =
× =1．
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