Question

25乘69+75乘77该怎么简便计算？

25乘69+75乘77

Answer 1

25*69+75*77=25*69+（25+50）*77=25*69+25*77+25*2*77=25*（69+77+154）=25*300=7500

Answer 2

25×69+75×(69+8)=25×69+25×69+75×8=(25+75)×69+600=6900+600=7500

Answer 3

25×69+75×77 =25×3×13+75×77 =75×(13+77)=75×90=6750

Answer 4

25*69+75*77=25*(69+3*77)=25*3*(23+77)=75*100=7500

Answer 5

25*69+75*77=75*(23+77)=75*100=7500