5分之4+2.4÷3分之2=4/5+2.4÷2/3=0.8+2.4x3/2=0.8+3.6=4.4
5分之4+2.4÷3分之2=4/5+2.4*3/2=0.8+3.6=4.4
. 4/5+2.4÷2/3=4/5+2.4×3/2=4/5+1.2×3/1=0.8+3.6=4.4
5/4+2.4÷3/2=5/4+2.4×2/3 =5/4+25/9 =25/29
5分之4等于0.8，2.4÷3分之2等于3.6，故为4.4
