长方形的周长一定比正方形的周长大． ．
直接写出得数．14×= 9÷= ﹣= +=×75%= 1÷×= （62.5%﹣）÷2= 1﹣（+）=
直接写出得数：×= 6.4×= 4﹣﹣= 1÷×=2.5×37×4= 8.1×= 0.6÷= ÷0.875﹣1=
直接写出得数+= = 12×（﹣）= =1÷7+= 6.4×101﹣6= 12÷3= ×××…×=
直接写出得数×= 1﹣= ÷= （7+）×8=0.1÷10%= ×6= a﹣a= 12×（﹣+）=
计算．+= ﹣= ×= ÷=1.25××8= 1.2×= 20÷= （﹣）×30=﹣÷2= 99×÷99×=
= 9÷
= 
﹣
= 
+
=
×75%= 1÷
×
）÷2= 1﹣（
+
）=
×
= 6.4×
﹣
= 1÷
×
= 0.6÷
= 
÷0.875﹣1=
+
= 
= 12×（
）= 
=
= 6.4×101﹣6
= 12
×
×
×…×
=
×
= 1﹣
= 
÷
= （7+
）×8=
×6= a﹣
a= 12×（
﹣
+
）=
+
= 
﹣
= 
×
= 
÷
=
×8= 1.2×
= 20÷
= （
﹣
）×30=
﹣
÷99×
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