=0.375=12÷ = %=0.45= %= ÷ ．
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÷=﹣=×=÷=
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=0.375=12÷ = %
=0.45= %= ÷ ．
= 18÷
=
=
=
．
= 3﹣
=
= 0.12÷20%= 0×
=
÷26=
= 15﹣
﹣
=
×4÷
+
=
÷
=
÷
=
+
×
=
×
= 12×
=
×
= 21÷
﹣84=
×
=
÷
=
÷4=
+
÷2=
÷11=
×6=
÷
=
×0=
﹣
=
+
= 6÷
﹣
=
=
÷