中，
，
，三角形ADE的面积是20平方厘米，三角形
相关试题
+
= 
﹣
=
= 18÷36=直接写出得数．
1.53﹣0.5= 7.8+0.9= 1+
= 12÷0.4=
0.56+4.44= 2，9+3.7+2.1= 4×0.25= 1.25×5×8=
7.6×8+2.4×8=
直接写出得数．
0.42×0.5= 0.51÷1.7= 5.2÷0.13= 99×1.01=
13.5﹣2.8﹣7.2= 32.8+19= 1.06×0.4=
+
=
1﹣
= 25×0.32×125=
+
= 
﹣
= 
+
﹣
= 
+
+
=
﹣
= 2﹣
= 1﹣
=
﹣
= 
+
= 
+
= 
+
=
= 
﹣
= 3+
= 
﹣
= 
+
+
= 
+3
=
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