直接写得数．
1.8÷0.3= 
÷75%= 1÷1
= 2﹣1
= 3
﹣
﹣
=
3÷4×
= 1
×
= 
×4.5= 1
÷1.375= 0.1×0.1÷0.1÷0.1=
直接写得数．
1.8÷0.3= ÷75%= 1÷1= 2﹣1= 3﹣﹣=
3÷4×= 1×= ×4.5= 1÷1.375= 0.1×0.1÷0.1÷0.1=
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