用15米长的栅栏靠一面墙围一个长方形，如果长方形的长和宽都是整数，长方形的面积最大是多少？
直接写得数1÷= ÷10= ××=×= ÷= 6×=
直接写出得数= = = 3×== = = =8×= =
直接写得数：1÷= +0.5= ÷8= （+）×36=×= 5﹣= ÷80%= 4﹣1﹣0.4=
甲数是24，正好是乙数的，乙数是多少？
直接写出得数．= = = == ×+= ﹣= +=
= 
÷10= 
×
×
=
×
= 
÷
= 6×
=
= 
= 
= 3×
=
= 
= 
= 
=
= 
=
= 
+0.5= 
÷8= （
+
）×36=
×
= 5
﹣
= 
÷80%= 4﹣1
﹣0.4=
，乙数是多少？
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= 
= 
=
= 
×
+
= 
﹣
= 
+
=
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