Question

54.9×0.38简便计算？

Answer 1

54.9×0.38
=55×0.38-0.1×0.38
=20.9-0.038
=20.862
所以这里可以通过简便计算得到答案是20.862。

Answer 2

54.9×2×0. 19
=109.8×0.19
=20.862

Answer 3

54.9×0.38没有简便运算。

Answer 4

4.05+37.85