今年psle的来谈谈怎么备考吧看到孩子没什么进步, 每天当父母的压力巨大!
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该帖荣获当日十大第10,奖励楼主1分以及1华新币,时间:2024-04-08 22:00:02。
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该帖荣获当日十大第7,奖励楼主6分以及9华新币,时间:2024-04-10 22:00:01。
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该帖荣获当日十大第9,奖励楼主2分以及3华新币,时间:2024-04-11 22:00:01。
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该帖荣获当日十大第2,奖励楼主18分以及27华新币,时间:2024-04-12 22:00:01。
借帖子问一下这种题不用方程怎么做啊
A farmer has some chickens and ducks. If he sells 2 chickens and 3 ducks every day, there will be 50 chickens left when all the ducks have been sold. If he sells 3 chickens and 2 ducks every day, there will be 25 chickens left when all the ducks have been sold.
a) how many ducks are there?
b) how many chickens are there ?
类似的题还有一些,涉及到同一个总数的两种分法,每种里面用不同的unit。画图也麻烦。
用方程简单,就是二元一次方程组。
a) how many ducks are there?
b) how many chickens are there ?
类似的题还有一些,涉及到同一个总数的两种分法,每种里面用不同的unit。画图也麻烦。
用方程简单,就是二元一次方程组。