问题
解答题
仓库有150吨钢材，第一次用去总数的20%，第二次用去总数的
|
答案
150×（1-20%-
）1 2
=150×30%
=45（吨）
答：还剩45吨钢材．
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仓库有150吨钢材，第一次用去总数的20%，第二次用去总数的
|
150×（1-20%-
）1 2
=150×30%
=45（吨）
答：还剩45吨钢材．
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