在一块长方形菜地（如图）的四周围上竹篱笆，竹篱笆至少需要多少米？
直接写出得数：÷=÷3=××=÷2= 6×=×9×= 5÷﹣÷5= 2.7﹣= （1.6+3.2）×0.125=
直接写得数： 12÷=×30=÷= 16×=÷=÷4=÷×1=÷×=÷3=÷6=÷3=÷．
直接写数：==========
直接写得数．×3= 6÷=÷1= 1÷÷=÷= 0.5÷=﹣= 0÷×=
直接写数： 7×=÷6=÷= 1.6÷0.7= 1÷3×=÷=÷=×0.15=÷=×÷×=
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