一个圆桶的底面周长是157厘米，它的底面面积是多少平方厘米？
直接写出得数．×= 2.4÷= 7﹣﹣= 0.24×50%=÷7=×37.5%= 1÷÷1=÷=×= 1÷=×9+=÷=
直接写得数．×= 1﹣= 7+6.2=÷1=÷=×= 2.5×=×=
直接写出答案========
×=÷6=
直接写得数÷7= 42×= 6÷=×33=÷=+= 10÷1%=﹣20%=﹣= 24×50%=
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×
= 2.4÷
= 7﹣
﹣
= 0.24×50%=
÷7=
×37.5%= 1÷
÷1=
÷
=
×
= 1
÷
=
×9+
÷
=
×
= 1﹣
= 7+6.2=
÷1=
÷
=
×
= 2.5×
=
×
=
=
=
=
=
=
=
=
=
×
=
÷6=
÷7= 42×
= 6÷
=
×33=
÷
=
+
= 10÷1%=
﹣
= 24×50%=