6.28÷3.14÷2=1(分米),
3.14×12=3.14(平方分米).
故答案为:3.14.
把一根长6.28分米的铁丝围成一个最大的圆,它的面积是_平方分米.
把一根长6.28分米的铁丝围成一个最大的圆,它的面积是______平方分米.
数学人气:913 ℃时间:2019-12-13 17:00:59
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