把一个长、宽分别是15厘米和10厘米的长方形，拉成一个一条高为12厘米的平行四边形，它的面积是 平方厘米．
==== ÷16．
2= = = ÷ ．
= ÷10=．
2=== ÷ ．
× =+ = ÷= ：5= ×0.35=1．
=
=
=
= ÷16．
=
=
= ÷ ．
= ÷10=
．
=
=
= ÷ ．
× =
+ = ÷
= ：5= ×0.35=1．
粤公网安备 44130202000953号