3.8×4.56+3.83×5.44怎样简便运算?_数学解答

3.8×4.56+3.83×5.44怎样简便运算?

人气：399 ℃　时间：2019-12-24 08:42:48

解答

3.8 X 4.56 + 3.83 X 5.44
= 3.8 X 4.56 + (3.8 + 0.03) X 5.44
= 3.8 X 4.56 + 3.8 X 5.44 + 0.03 X 5.44
= 3.8 X (4.56 + 5.44) + 0.3 X 0.544
= 3.8 X 10 + 0.1632
= 38.1632