实验小学运动会跳绳比赛,乐乐,笑笑,甜甜三人一组.乐乐一分钟跳150下,笑笑一分钟跳的下数是乐乐的5分之4甜甜一分钟跳的下数是笑笑的4分之3.笑笑、甜甜一分钟跳多少下?
haoyyyang滰
笑笑=150×4/5=120下；甜甜=120×3/4=90下；
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扫描下载二维码跳绳比赛,乐乐1.5分钟跳了90下,照这样计算,她5钟能跳多少下?
90÷1.5×5＝60×5＝300（下）即她5分钟能跳300下
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