五分之四乘三分之二加五分之一除以四分之三怎样简便(4/5)×(2/3)+(1/5)÷(3/4)=(4/5)×(2/3)+(1/5)×(4/3)=(4/5)×(2/3)+(4/5)×(1/3)=(4/5)×(2/3+1/3)=(4/5)×1=4/5.
(4/5)×(2/3)+(1/5)÷(3/4)=8/15+(1/5)*(4/3)=8/15+4/15=12/15=4/5
