Notallmathskillsarelearnedintheclassroom．Someofthemcome...
問題詳情：Notallmathskillsarelearnedintheclassroom．Someofthemcomenaturally．Considerthesplit-secondcalculations youmakewhenyouestimate（估計）thenumberofemptyseatsontheschoolbusorthenumberofcookiesinacookieja...