直接写出得数÷3= ×15= 2﹣=36+48= ×75%= ×4×=298+405≈ ×99+99×=
直接写得数 = = = = == = = = =
里包含多少个？
=
把6米长的钢管平均截成9段，每段占全长的几分之几？3段占全长的几分之几？每段长多少米？
在（ ）里填入适当的数，使等式成立．．
÷3= 
×15= 2﹣
=
×75%= 
×4×
=
×99+99×
= 
= 
= 
= 
=
= 
= 
= 
= 
=
里包含多少个
？
=
．
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