1+1.2+1.4+1.6+1.8+2.+9.6+9.8+10?怎么列算式?
问题描述:
1+1.2+1.4+1.6+1.8+2.+9.6+9.8+10?怎么列算式?
答
1+1.2+1.4+1.6+1.8+2.+9.6+9.8+10
=(10+12+14+.+100)/10
=(10+100)*[(100-10)/2+1]/(2*10)
=110*46/20
=253