（北京）如图：梯形ABCD中，AD∥BC，AC、BD交于M，，若S△ADM=1，求：梯形的面积．
填一填．
直接写得数．+= ﹣= 0.2﹣=+= ﹣= +2÷9=2﹣﹣= 1.55﹣= 1﹣﹣+=0.5﹣﹣=
计算．= = == = 1﹣== =
看图计算下面各题．+= +=
计算下列各题：= = == = == =
，若S△ADM=1，求：梯形的面积．
+
= 
﹣
= 0.2﹣
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+
= 
﹣
= 
+2÷9=
﹣
= 1.55﹣
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=
= 
= 
=
= 
= 1﹣
=
= 
=
+
=
+
=
= 
= 
=
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