计算下面各题．0.672÷4.2 0.24÷4.8 40÷12.5 29.4÷0.28．
口算我最棒!=========
口算×=×= 12×=+3=÷=÷4=×= 5÷=
直接写得数======
带分数除法． （1）例：4÷1=÷= = 分数除法中有带分数的，先把带分数化成 ，然后 ． （2）试一试． 16÷1÷1 4÷5÷1 2÷1 6÷ 1×3 2﹣．
6吨的等于1吨的．
=
=
=
=
=
=
=
=
=
×
×
= 12×
=
+3=
÷
=
÷4=
×
= 5÷
=
=
=
=
=
=
=
÷1
=
÷
= = 
÷1
4
÷5
÷1
÷1
6
÷
×3
2
﹣
．
等于1吨的
．
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