栖山粮仓运进大米480吨，相当于原来存粮数的3倍，原来存粮多少吨？
直接写出得数： 47+199=÷6= 3÷0.9= 13.5÷9= 6÷7×=﹣= 40.5﹣0.05= 2÷10%=×= 6900÷30=
直接写得数．÷3= 10÷=÷=×=÷=×= 4×= 1﹣=
计算×60=×=×=××=÷5= 30÷=÷=×÷=
直接写出得数． 2.4﹣= 16×20=÷6= （2﹣）×20%= 2.2+3.57=+=×= 14﹣14÷2=
2﹣1.02= 1+3.25= 4÷= 2.5×=﹣= 10﹣1=﹣×= 0.37÷ = （1﹣100%）×3=
÷6= 3÷0.9= 13.5÷9=
=
= 40.5﹣0.05= 2÷10%=
×
= 6900÷30=
÷3= 10÷
=
÷
=
×
=
÷
=
×
= 1﹣
=
×60=
×
=
×
×
×
÷5= 30÷
=
÷
=
÷
=
=
÷6=
）×20%=
=
×
=
+3.25= 4÷
= 2.5×
=
﹣
= 10﹣1
=
﹣
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