Notallmathskillsarelearnedintheclassroom．Someofthemcome...
问题详情：Notallmathskillsarelearnedintheclassroom．Someofthemcomenaturally．Considerthesplit-secondcalculations youmakewhenyouestimate（估计）thenumberofemptyseatsontheschoolbusorthenumberofcookiesinacookieja...