一、7.42×20.15

问题描述:

一、7.42×20.15
二、(3.3×64.8×50)÷(111×32.4×5)

7.42×20.15
=(7.5-0.08)*(20+0.15)
=149.513

7.42×20.15
=7×1.06×20.15
=7×(1+0.06)×(20+0.15)
=7×21.359
=149.513
(3.3×64.8×50)÷(111×32.4×5)
=(3.3÷111)×(64.8÷32.4)×(50÷5)
=0.66