一个长方形木框拉成平行四边形后，它的周长缩短了． ．
直接写出得数．1÷100÷10= 1﹣= +1÷3= 6×=60%÷12= ×= ÷= 500×3%=
直接写出得数：×8= ÷2= ÷= ×=×= 1÷= ÷60%= ×15=﹣= 6.8÷10%= 4.5+= ×=
直接写出得数．×30= 2÷= ÷= ﹣=÷= ××= +12.5%= ÷=
直接写得数．25×= ÷6= ×16= ÷= 1÷= ×=
直接写出得数÷= 20×= ÷= ﹣=12÷50%= 3﹣﹣= 60×20%= ÷26=+= 1﹣3%=
= 
+1÷3= 6×
=
×
= 500×3%=
×8= 
÷2= 
÷
= 
×
=
×
= 1÷
= 
÷60%= 
×15=
﹣
×
=
×30= 2÷
÷
= 
﹣
=
÷
= 
×
×
= 
+12.5%= 
÷
=
= 
÷6= 
×16= 
÷
= 1÷
= 
×
=
÷
= 20×
÷
= 
﹣
=
= 60×20%= 
÷26=
+
= 1﹣3%=
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