÷= ÷12= ÷= 1÷=5÷= ÷21= ÷= ÷=÷= ÷= ×= ﹣=
计算下面各题，能简便的要简便．．
被减数是，减数是，差是多少？
直接写出得数 400×6= 55÷9=﹣=+=
下面各题怎样算简便就怎样算． 6﹣﹣．
直接写得数．﹣=﹣=+=+=+=﹣=﹣= 0.3+=
÷
= 
÷12= 
÷
= 1÷
=
= 
÷21= 
÷
= 
÷
=
÷
= 
÷
= 
×
= 
﹣
=
．
，减数是
，差是多少？
﹣
=
+
=
﹣
．
﹣
=
﹣
=
+
=
+
=
+
=
﹣
=
﹣
= 0.3+
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