五分之四乘三分之二加五分之一除以四分之三 =4/5×2/3+1/5÷(3/4) =4/5×2/3+1/5×4/3; =4/5×(2/3+1/3) =4/5×1 =4/5;
4/5×2/3+1/5÷3/4
