把8枝红铅笑和2枝蓝铅笔放在一包里，让你每次任意摸出一枝，这样摸10000次，摸出红铅笔的次数大约占总次数的百分之几？
直接写出得数÷3= ×15= 2﹣=36+48= ×75%= ×4×=298+405≈ ×99+99×=
直接写出得数．×= ÷= ÷= 1.8÷= 0.2÷3=÷= ×= ××0= ×÷×= 18÷÷=
你能直接写出下列各题的结果吗？试试看×= ÷= ××= 4.5%= ×12= ÷4= （+）×= = %
计算．× ÷ ÷×× ÷6× ÷7÷．
直接写得数．= 24÷= = == = =
÷3= 
×15= 2﹣
=
×75%= 
×4×
=
×99+99×
×
= 
÷
= 
÷
= 1.8÷
= 0.2÷3=
÷
= 
×
= 
×
×0= 
×
÷
×
÷
=
×
= 
÷
×
×
= 
×12= 
÷4= 
+
）×
= 
= %
×
÷
÷
×
×
÷6×
÷7÷
．
= 24÷
= 
= 
=
= 
= 
=
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