下面各题怎样算简便就怎样算：①3.6×1.25+0.32÷0.4 ②455﹣12.5×4÷8.1 ③8.25×4.8+4.8×1.75
= 5== ÷ ．
在横线里填上合适的数：===，== 9÷ ====．
0.7÷5=7： == %．
=0.375=21÷ =6： = %．
5：6可以写成5÷6，比值是1.2．所以2：3：4=2÷3÷4． ．
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9÷ =
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= %．
=0.375=21÷ =6： = %．
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