(2.8*25+12)/(28*2.5)的简便算法要简便算法!简便算法啊!
问题描述:
(2.8*25+12)/(28*2.5)的简便算法
要简便算法!
简便算法啊!
答
(2.8*25+12)/(28*2.5)
=(28*2.5+12)/(7*4*2.5)
=(7*4*2.5+12)/7
=(7+12)/7
=19/7
答
k
答
(2.8*25+12)/(28*2.5)
=(2.8*25/(28*2.5)+12/(28*2.5)
=1+6/35
=1又6/35