①126又1/49÷25

问题描述:

①126又1/49÷25
②(1+1/2+1/3+1/4)×(1/2+1/3+1/4+1/5)-(1+1/2+1/3+1/4+1/5)×(1/2+1/3+1/4)
③48又7/10×999+48.7÷(2-1/2-1/3-1/6)
④(1/5+1/7+1/9+1/11)×(1/7+1/9+1/11+1/13)-(1/5+1/7+1/9+1/11+1/13)×(1/7+1/9+1/11
简便计算啦!

①126又1/49÷25=(125+1又1/49)÷25=125÷25+50/49÷25=5+2/49=5又2/49②(1+1/2+1/3+1/4)×(1/2+1/3+1/4+1/5)-(1+1/2+1/3+1/4+1/5)×(1/2+1/3+1/4)=(1+1/2+1/3+1/4)(1/2+1/3+1/4+1/5)-(1/2+1/3+1/4)-(1/2+1/...