分数的概念其实year1 就引入了,比如蛋糕,披萨饼切一半,再平均切成四
英国7岁使用的数学书
英国本地year1学员数学7 作业.
popflyboys maths for 7 year olds worksheets kindergarten
新西兰小学year23数学练习题
Tips:Do Not Provide
Personal Loans: Go Easy On Your Finances
Finance, Finance, Finance, Foreign Exchange, Stocks, Currency Circle, Venture Capital, Bitcoin, ICO...