问题
解答题
某小学四年级有4个班，其中一班、二班共84人，二班、三班和四班共136人，又知二班学生人数恰好是全年级人数的25%，该校四年级一共有多少人．
答案
（136+84）÷（1+25%），
=220÷1.25，
=176（人）；
答：四年级一共有176人．
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某小学四年级有4个班，其中一班、二班共84人，二班、三班和四班共136人，又知二班学生人数恰好是全年级人数的25%，该校四年级一共有多少人．
（136+84）÷（1+25%），
=220÷1.25，
=176（人）；
答：四年级一共有176人．
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