直接写数对又快
66+8= 3.8+6.2= 
×
= 47﹣8= 3.8÷0.19=
12÷
= 56÷4= 24×0.5= 
= 471﹣299=
1÷0.25= 
= 600÷5= 8﹣0.8= 
=
1.06×8×12.5= 1.5×0.6= 
= 6.6+4= 1.5÷0.3=
= 1﹣0.05= 
×4= 
= 
÷3=
﹣
= 2﹣
﹣
= 
= 1﹣
÷
1+
÷=
是 ，5.06扩大到它的 倍是5060．
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