口算 20÷40= 15×60= 700÷70= 63÷7×8=15×40= 25×40= 630÷90= 640÷80÷4=
把假分数化成带分数或整数．① ② ．
把下面的假分数化成带分数或整数．= = = =
把带分数化成假分数．2= 3= 1= 4=
数的改写．（1）把下面的分数化成小数，小数化成分数．==0.28=0.035=（2）把下列分数中的假分数化成带分数，带分数化成假分数．====
把假分数化成带分数或把带分数化成假分数．====
②
．
= 
= 
= 
=
= 3
= 1
= 4
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=
=
=
=
=
=
=
=
=
=
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