一个周长是100米的长方形大厅，长比宽的2倍少1米，这个长方形大厅的面积是多少平方米？
计算．× ÷ ÷×× ÷6× ÷7÷．
直接写得数．= 24÷= = == = =
直接写出得数．12×= ÷= 0÷= ﹣= 12×（×）=×= ÷= 20÷= += ×90×=
直接写出得数：×12= 1÷= ×= += ÷2=6﹣= 0÷= ×= ÷= ﹣=
表示 ；表示 ．
×
÷
÷
×
×
÷6×
÷7÷
．
= 24÷
= 
= 
=
= 
= 
=
= 
÷
= 0÷
= 
﹣
= 12×（
×
×
= 
÷
= 20÷
= 
+
= 
×90×
=
×12= 1÷
= 
×
= 
+
= 
÷2=
= 
×
= 
÷
= 
﹣
=
表示 ；
表示 ．
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