小红家住在三楼,每一层楼梯都有10级台阶,小红要走()级台阶.
小红家住在三楼,每一层楼梯都有10级台阶,小红要走()级台阶.
数学人气:615 ℃时间:2019-12-20 16:21:43
优质解答
20个呗~一楼到二楼是10,二楼到三楼也是10所以20个呗
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