长方形是特殊的平行四边形． ．
一个数与分数相乘，积一定小于这个数． ．
×= ．
直接写出下面各题的得数．1﹣= 32÷8= 51÷7=300×4= 9÷= 24÷5=70×90= 560+350= +=52÷6= 180×0= 5600﹣3000=
．
×2= ×1= ×= 12×=0.9×= ×7= ×= 5﹣=×= 9×=
×
．
= 32÷8= 51÷7=
= 24÷5=
+
=
．
×2= 
×1= 
×
= 12×
= 
×7= 
×
= 5﹣
=
×
= 9×
=
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