Question

54.9×0.38=用简便计算怎么算？

Answer 1

54.9×0.38=20.862

Answer 2

54.9×0.38
=55×0.38—0.1×0.38
=50×0.38+5×0.38—仔猛0.1×0.38
=19+1.9—念差桥庆瞎0.038
=20.862

Answer 3

54.9*0.38这道题考的是初中的除法口决链友猛除余一棚桥个数等于乘以这个数的倒数，举个例子4分之2的倒数是2分之4，告稿54.9*0.38等于20.862。

Answer 4

：54.9x0.38=(55-0.1)x(0.4-0.02)=55x(0.4-0.02)-0.1x(0.4-0.02)=22-1.1-0.04+0.002=20.862。

Answer 5

54.9×0.38=用简便槐戚神计算怎么算？铅亏仔念
54.9x0.38
=（55-0.1）x0.38
=55x0.38-0.1x0.38
=20.9-0.038
=20.862