一块长方形的地，它的长是40m，宽是20m．（1）这块地有多大？（2）如果用栅栏围起来，栅栏有多长？（3）种37行果树，每行15棵．一共可以种多少棵？
+= ÷= 12.6﹣6.06= 201+75= ×=
直接写出得数：﹣= 6×= 0÷= ×=+= ÷= ×= ×=
+= ﹣= += +=1+= 2﹣1= ﹣= 3﹣=1+2= ×= 7﹣4= ×13=×4= 8×= ÷= 5÷=÷8= 8÷= 3÷= ÷=
直接写得数．1﹣+= 1.25×0.8= 72÷= 10.6﹣5.62=0.33= 11.1÷0.3= ×= 4.1×25+3.9×25=
直接写出得数．+= ÷= 3﹣1.95= ×= 6.3÷0.07=÷6= 0÷= ﹣= +3÷= ×﹣0.75×=
+
= 
÷
= 12.6﹣6.06= 201+75= 
×
=
﹣
= 6×
= 0÷
= 
×
=
+
= 
÷
= 
×
= 
×
=
+
= 
﹣
= 
+
= 
+
=
+
= 2
﹣1
= 
﹣
= 3
﹣
=
+2
= 
= 7﹣4
= 
×13
=
×4= 8×
= 
÷
= 5÷
=
÷8= 8÷
= 3
÷
= 
÷
=
+
= 1.25×0.8= 72÷
= 10.6﹣5.62=
×
= 4.1×25+3.9×25=
+
= 
÷
= 3﹣1.95= 
×
= 6.3÷0.07=
÷6= 0÷
= 
﹣
= 
+3÷
= 
﹣0.75×
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