一堆沙石，用去35吨，还剩15吨，剩下的沙石占这堆沙石的几分之几？
口算下面各题．= 18÷== =．
直接写出得数．= 3﹣= = 0.12÷20%= 0×=0.56×0.1= ÷26= = 15﹣﹣= ×4÷×4=
直接写出得数+= ÷= ÷= +×=×= 12×= ×= 21÷﹣84=12××= ÷= ÷4= +÷2=
直接写得数．÷11= ×6= ÷= ×0= ﹣=+= 6÷= ﹣= ×= ÷=
= 18÷
=
= 
=
．
= 3﹣
= 
= 0.12÷20%= 0×
=
÷26= 
= 15﹣
﹣
= 
×4÷
+
= 
÷
= 
÷
= 
+
×
=
×
= 12×
= 
×
= 21÷
﹣84=
×
= 
÷
= 
÷4= 
+
÷2=
÷11= 
×6= 
÷
= 
×0= 
﹣
=
+
= 6÷
﹣
= 
= 
÷
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