35乘36加36乘37加34乘35加37乘34 用简便方法怎么做

题目

35乘36加36乘37加34乘35加37乘34 用简便方法怎么做

答案

35*36+36*37+34*35+37*34
=35*(36+34)+37*(36+34)
=35*70+37*70
=70*(35+37)
=70*72
=5040