直接写出答案．
400÷80= 30×80= 620÷20= 19×30= 6400÷400=
28×400= 480÷80= 560÷70= 18×5+4= 3×25×4=
相关试题
直接写出答案．
400÷80= 30×80= 620÷20= 19×30= 6400÷400=
28×400= 480÷80= 560÷70= 18×5+4= 3×25×4=
×4= ； 2﹣
= 1
； 
÷
= ； 
×
×
= ； 
÷
= ； 
×
= ； 
+
= ；
= ； 
×18= ； 
×
= ； 
÷
= ．
= 
= 
= 1
= 0×
=
= 
= 
= 20
= 
=
÷
= 
÷3=
×
×
= 
÷2=
= 
×9×
=
﹣
=
= 
×30= 
÷
= 16×
÷
÷4= 
÷
×1= 
÷
×
=
÷3= 
÷6= 
÷3= 
÷
．
= 
= 
= 
= 
=
= 
= 
= 
= 
=
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