一、填空 (1)一个面积是( )平方米的半圆的周长是15.42米.(2)一条绳子长50米,先用去5分之3,又用去5又2分之1米,还剩( )米.(3)一个数与它自己的和、差、商相加的和是12.2,这个数是(
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![一、填空 (1)一个面积是( )平方米的半圆的周长是15.42米.(2)一条绳子长50米,先用去5分之3,又用去5又2分之1米,还剩( )米.(3)一个数与它自己的和、差、商相加的和是12.2,这个数是(](/uploads/image/z/1992055-31-5.jpg?t=%E4%B8%80%E3%80%81%E5%A1%AB%E7%A9%BA+%EF%BC%881%EF%BC%89%E4%B8%80%E4%B8%AA%E9%9D%A2%E7%A7%AF%E6%98%AF%EF%BC%88+%EF%BC%89%E5%B9%B3%E6%96%B9%E7%B1%B3%E7%9A%84%E5%8D%8A%E5%9C%86%E7%9A%84%E5%91%A8%E9%95%BF%E6%98%AF15.42%E7%B1%B3.%EF%BC%882%EF%BC%89%E4%B8%80%E6%9D%A1%E7%BB%B3%E5%AD%90%E9%95%BF50%E7%B1%B3%2C%E5%85%88%E7%94%A8%E5%8E%BB5%E5%88%86%E4%B9%8B3%2C%E5%8F%88%E7%94%A8%E5%8E%BB5%E5%8F%882%E5%88%86%E4%B9%8B1%E7%B1%B3%2C%E8%BF%98%E5%89%A9%EF%BC%88+%EF%BC%89%E7%B1%B3.%EF%BC%883%EF%BC%89%E4%B8%80%E4%B8%AA%E6%95%B0%E4%B8%8E%E5%AE%83%E8%87%AA%E5%B7%B1%E7%9A%84%E5%92%8C%E3%80%81%E5%B7%AE%E3%80%81%E5%95%86%E7%9B%B8%E5%8A%A0%E7%9A%84%E5%92%8C%E6%98%AF12.2%2C%E8%BF%99%E4%B8%AA%E6%95%B0%E6%98%AF%EF%BC%88)
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