如题所述
第1个回答 2016-08-08
先把25x36分解成5x5x6x6=5x6x5x6=900
然后就直接35x900=31500
然后就直接35x900=31500
第2个回答 2016-08-08
35=30+5
25=20+5
36=30+6
则
35×(25×36)
=(30+5)((20+5)(30+6))
=(30+5)(20*30+20*6+5*30+5*6)
=(30+5)(600+120+150+30)
=(30+5)*900
=30*900+5*900
=27000+4500
=31500
25=20+5
36=30+6
则
35×(25×36)
=(30+5)((20+5)(30+6))
=(30+5)(20*30+20*6+5*30+5*6)
=(30+5)(600+120+150+30)
=(30+5)*900
=30*900+5*900
=27000+4500
=31500
第3个回答 2016-08-08
35*25*36=35*(25*4)*9=35*9*100=315*100=31500本回答被提问者和网友采纳