和差問(wèn)題 | 和倍問(wèn)題 | 差倍問(wèn)題 | |
已知條件 | 幾個(gè)數(shù)的和與差 | 幾個(gè)數(shù)的和與倍數(shù) | 幾個(gè)數(shù)的差與倍數(shù) |
公式適用范圍 | 已知兩個(gè)數(shù)的和,差,倍數(shù)關(guān)系 | ||
公式 | ①(和-差)÷2=較小數(shù)較小數(shù)+差=較大數(shù)和-較小數(shù)=較大數(shù)②(和+差)÷2=較大數(shù)較大數(shù)-差=較小數(shù)和-較大數(shù)=較小數(shù) | 和÷(倍數(shù)+1)=小數(shù)小數(shù)×倍數(shù)=大數(shù)和-小數(shù)=大數(shù) | 差÷(倍數(shù)-1)=小數(shù)小數(shù)×倍數(shù)=大數(shù)小數(shù)+差=大數(shù) |
關(guān)鍵問(wèn)題 | 求出同一條件下的 | ||
和與差 | 和與倍數(shù) | 差與倍數(shù) |