和差問(wèn)題的公式(和＋差)÷2＝大數(shù)(和－差)÷2＝小數(shù){0}2，和差問(wèn)題公式（合+差）/2=大數(shù)（合-差）/2=小數(shù){1}3，和差問(wèn)題的公式和差2大數(shù)和差2小數(shù)和倍問(wèn)題和倍和差問(wèn)題的公式(和＋差)÷2＝大數(shù)(和－差)÷2＝小數(shù)和倍問(wèn)題和÷(倍數(shù)－1)＝小數(shù)小數(shù)×倍數(shù)＝大數(shù)(或者和－小數(shù)＝大數(shù))差倍問(wèn)題差÷(倍數(shù)－1)＝小數(shù)小數(shù)×倍數(shù)＝大數(shù)(或小數(shù)＋差＝大數(shù)){2}4，和差問(wèn)題公式總數(shù)÷總份數(shù)＝平均數(shù)和差問(wèn)題的公式(和＋差)÷2＝大數(shù)(和－差)÷2＝小數(shù)和倍問(wèn)題和÷(倍數(shù)－1)＝小數(shù)小數(shù)×倍數(shù)＝大數(shù)(或...