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直接写得数． 5÷×16××30×÷11（+）×48
直接写得数÷= 18×=+=××= 1÷50%=×0=﹣= 6×﹣×5=
你能全算对吗？试试看÷=×3=﹣= 6÷=（+）×56=+=×= 1÷5×=
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÷===．
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×16
×
×30
×
÷11（
+
）×48
÷
= 18×
=
+
=
×
×
=
×0=
﹣
= 6×
﹣
÷
=
×3=
﹣
= 6÷
=（
+
）×56=
+
=
×
= 1÷5×
=
= 18÷
=
=
=
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