48乘1.08加1.2乘56.8要简便运算

问题描述:

48乘1.08加1.2乘56.8要简便运算

48*1.08+1.2*56.8
=4.8*10.8+(1.2*4)*(56.8/4)
=4.8*10.8+4.8*14.2
=4.8*(10.8+14.2)
=4.8*25
=(4.8/4)*25*4
=1.2*100
=120