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数学
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往480克浓度为10%的糖水中加入20克糖,这时糖水的浓度变为______%.
人气:135 ℃ 时间:2019-10-18 08:26:57
解答
480×10%=48(克);
(48+20)÷(480+20)×100%,
=68÷500×100%,
=13.6%;
答:这时糖水的浓度变为13.6%.
故答案为:13.6.
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